21607150170617 has 16 divisors (see below), whose sum is σ = 23746802897664. Its totient is φ = 19497248034000.

The previous prime is 21607150170509. The next prime is 21607150170637. The reversal of 21607150170617 is 71607105170612.

It is a de Polignac number, because none of the positive numbers 2^k-21607150170617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21607150170637) 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, 12244859 + ... + 13897872.

It is an arithmetic number, because the mean of its divisors is an integer number (1484175181104).

Almost surely, 2^{21607150170617} is an apocalyptic number.

It is an amenable number.

21607150170617 is a deficient number, since it is larger than the sum of its proper divisors (2139652727047).

21607150170617 is a wasteful number, since it uses less digits than its factorization.

21607150170617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26143300.

The product of its (nonzero) digits is 123480, while the sum is 44.

The spelling of 21607150170617 in words is "twenty-one trillion, six hundred seven billion, one hundred fifty million, one hundred seventy thousand, six hundred seventeen".