161529016455 has 32 divisors (see below), whose sum is σ = 288086123520. Its totient is φ = 85871780640.

The previous prime is 161529016427. The next prime is 161529016471. The reversal of 161529016455 is 554610925161.

161529016455 is a `hidden beast` number, since 1 + 61 + 52 + 90 + 1 + 6 + 455 = 666.

It is not a de Polignac number, because 161529016455 - 2⁶ = 161529016391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 161529016455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1881667 + ... + 1965636.

It is an arithmetic number, because the mean of its divisors is an integer number (9002691360).

Almost surely, 2^161529016455 is an apocalyptic number.

161529016455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161529016455 is a deficient number, since it is larger than the sum of its proper divisors (126557107065).

161529016455 is a wasteful number, since it uses less digits than its factorization.

161529016455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847628 (or 3847622 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 161529016455 in words is "one hundred sixty-one billion, five hundred twenty-nine million, sixteen thousand, four hundred fifty-five".