161566101001500 has 96 divisors (see below), whose sum is σ = 506671292801856. Its totient is φ = 39770117164800.

The previous prime is 161566101001493. The next prime is 161566101001507. The reversal of 161566101001500 is 5100101665161.

It is an interprime number because it is at equal distance from previous prime (161566101001493) and next prime (161566101001507).

It is a super-2 number, since 2×161566101001500² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161566101001507) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4142701039 + ... + 4142740038.

It is an arithmetic number, because the mean of its divisors is an integer number (5277825966686).

Almost surely, 2^{161566101001500} is an apocalyptic number.

161566101001500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161566101001500 is an abundant number, since it is smaller than the sum of its proper divisors (345105191800356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161566101001500 is a wasteful number, since it uses less digits than its factorization.

161566101001500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8285441112 (or 8285441100 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 33.

Adding to 161566101001500 its reverse (5100101665161), we get a palindrome (166666202666661).

The spelling of 161566101001500 in words is "one hundred sixty-one trillion, five hundred sixty-six billion, one hundred one million, one thousand, five hundred".