21264150525025 has 48 divisors (see below), whose sum is σ = 28522647576576. Its totient is φ = 15664475473920.

The previous prime is 21264150525001. The next prime is 21264150525043. The reversal of 21264150525025 is 52052505146212.

It is a de Polignac number, because none of the positive numbers 2^k-21264150525025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56882272 + ... + 57254878.

It is an arithmetic number, because the mean of its divisors is an integer number (594221824512).

Almost surely, 2^{21264150525025} is an apocalyptic number.

21264150525025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21264150525025 is a deficient number, since it is larger than the sum of its proper divisors (7258497051551).

21264150525025 is a wasteful number, since it uses less digits than its factorization.

21264150525025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375538 (or 375533 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 40.

The spelling of 21264150525025 in words is "twenty-one trillion, two hundred sixty-four billion, one hundred fifty million, five hundred twenty-five thousand, twenty-five".