21652726512417 has 32 divisors (see below), whose sum is σ = 38762922992640. Its totient is φ = 10382925798720.

The previous prime is 21652726512379. The next prime is 21652726512419. The reversal of 21652726512417 is 71421562725612.

It is not a de Polignac number, because 21652726512417 - 2²² = 21652722318113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21652726512417.

It is not an unprimeable number, because it can be changed into a prime (21652726512419) 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, 3605179567 + ... + 3605185572.

It is an arithmetic number, because the mean of its divisors is an integer number (1211341343520).

Almost surely, 2^{21652726512417} is an apocalyptic number.

It is an amenable number.

21652726512417 is a deficient number, since it is larger than the sum of its proper divisors (17110196480223).

21652726512417 is a wasteful number, since it uses less digits than its factorization.

21652726512417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7210365173.

The product of its digits is 2822400, while the sum is 51.

The spelling of 21652726512417 in words is "twenty-one trillion, six hundred fifty-two billion, seven hundred twenty-six million, five hundred twelve thousand, four hundred seventeen".