21162525925601 has 16 divisors (see below), whose sum is σ = 22716296294400. Its totient is φ = 19655905928400.

The previous prime is 21162525925579. The next prime is 21162525925627. The reversal of 21162525925601 is 10652952526112.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21162525925601 is a prime.

It is a super-2 number, since 2×21162525925601² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21162525925631) 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, 43578545 + ... + 44061486.

It is an arithmetic number, because the mean of its divisors is an integer number (1419768518400).

Almost surely, 2^{21162525925601} is an apocalyptic number.

It is an amenable number.

21162525925601 is a deficient number, since it is larger than the sum of its proper divisors (1553770368799).

21162525925601 is a wasteful number, since it uses less digits than its factorization.

21162525925601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87640300.

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 21162525925601 in words is "twenty-one trillion, one hundred sixty-two billion, five hundred twenty-five million, nine hundred twenty-five thousand, six hundred one".