25315539965 has 8 divisors (see below), whose sum is σ = 30385020120. Its totient is φ = 20248183872.

The previous prime is 25315539947. The next prime is 25315540009. The reversal of 25315539965 is 56993551352.

It can be written as a sum of positive squares in 4 ways, for example, as 11002489 + 25304537476 = 3317^2 + 159074^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25315539965 - 2⁶ = 25315539901 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504674 + ... + 552563.

It is an arithmetic number, because the mean of its divisors is an integer number (3798127515).

Almost surely, 2^25315539965 is an apocalyptic number.

It is an amenable number.

25315539965 is a deficient number, since it is larger than the sum of its proper divisors (5069480155).

25315539965 is a wasteful number, since it uses less digits than its factorization.

25315539965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062031.

The product of its digits is 5467500, while the sum is 53.

The spelling of 25315539965 in words is "twenty-five billion, three hundred fifteen million, five hundred thirty-nine thousand, nine hundred sixty-five".