21602650775855 has 16 divisors (see below), whose sum is σ = 26125809552000. Its totient is φ = 17147289519360.

The previous prime is 21602650775851. The next prime is 21602650775887. The reversal of 21602650775855 is 55857705620612.

It is not a de Polignac number, because 21602650775855 - 2² = 21602650775851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21602650775794 and 21602650775803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21602650775851) 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, 15236150 + ... + 16593539.

It is an arithmetic number, because the mean of its divisors is an integer number (1632863097000).

Almost surely, 2^{21602650775855} is an apocalyptic number.

21602650775855 is a deficient number, since it is larger than the sum of its proper divisors (4523158776145).

21602650775855 is a wasteful number, since it uses less digits than its factorization.

21602650775855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31830754.

The product of its (nonzero) digits is 35280000, while the sum is 59.

The spelling of 21602650775855 in words is "twenty-one trillion, six hundred two billion, six hundred fifty million, seven hundred seventy-five thousand, eight hundred fifty-five".