169157915661 has 16 divisors (see below), whose sum is σ = 264051381888. Its totient is φ = 94304064000.

The previous prime is 169157915657. The next prime is 169157915671. The reversal of 169157915661 is 166519751961.

It is not a de Polignac number, because 169157915661 - 2² = 169157915657 is a prime.

It is a super-2 number, since 2×169157915661² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169157915611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98232540 + ... + 98234261.

It is an arithmetic number, because the mean of its divisors is an integer number (16503211368).

Almost surely, 2^169157915661 is an apocalyptic number.

It is an amenable number.

169157915661 is a deficient number, since it is larger than the sum of its proper divisors (94893466227).

169157915661 is a wasteful number, since it uses less digits than its factorization.

169157915661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196466852.

The product of its digits is 3061800, while the sum is 57.

The spelling of 169157915661 in words is "one hundred sixty-nine billion, one hundred fifty-seven million, nine hundred fifteen thousand, six hundred sixty-one".