25140421636965 has 128 divisors (see below), whose sum is σ = 45525947097600. Its totient is φ = 13325365665792.

The previous prime is 25140421636951. The next prime is 25140421637033. The reversal of 25140421636965 is 56963612404152.

25140421636965 is a `hidden beast` number, since 2 + 5 + 1 + 4 + 0 + 4 + 216 + 369 + 65 = 666.

It is not a de Polignac number, because 25140421636965 - 2⁹ = 25140421636453 is a prime.

It is a super-2 number, since 2×25140421636965² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2315163706 + ... + 2315174564.

It is an arithmetic number, because the mean of its divisors is an integer number (355671461700).

Almost surely, 2^{25140421636965} is an apocalyptic number.

It is an amenable number.

25140421636965 is a deficient number, since it is larger than the sum of its proper divisors (20385525460635).

25140421636965 is a wasteful number, since it uses less digits than its factorization.

25140421636965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12175 (or 12157 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 25140421636965 in words is "twenty-five trillion, one hundred forty billion, four hundred twenty-one million, six hundred thirty-six thousand, nine hundred sixty-five".