5161501656 has 128 divisors (see below), whose sum is σ = 14636160000. Its totient is φ = 1685024640.

The previous prime is 5161501651. The next prime is 5161501669. The reversal of 5161501656 is 6561051615.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 5161501656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161501651) 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, 2234230 + ... + 2236538.

It is an arithmetic number, because the mean of its divisors is an integer number (114345000).

Almost surely, 2^5161501656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5161501656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7318080000).

5161501656 is an abundant number, since it is smaller than the sum of its proper divisors (9474658344).

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

5161501656 is a wasteful number, since it uses less digits than its factorization.

5161501656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534 (or 2524 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 5161501656 is about 71843.5916140055. The cubic root of 5161501656 is about 1728.1921323787.

The spelling of 5161501656 in words is "five billion, one hundred sixty-one million, five hundred one thousand, six hundred fifty-six".