25320939551 has 8 divisors (see below), whose sum is σ = 26655137520. Its totient is φ = 23986893312.

The previous prime is 25320939541. The next prime is 25320939599. The reversal of 25320939551 is 15593902352.

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 25320939551 - 2¹⁸ = 25320677407 is a prime.

It is a super-2 number, since 2×25320939551² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25320939541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501311 + ... + 549503.

It is an arithmetic number, because the mean of its divisors is an integer number (3331892190).

Almost surely, 2^25320939551 is an apocalyptic number.

25320939551 is a deficient number, since it is larger than the sum of its proper divisors (1334197969).

25320939551 is a wasteful number, since it uses less digits than its factorization.

25320939551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75865.

The product of its (nonzero) digits is 364500, while the sum is 44.

The spelling of 25320939551 in words is "twenty-five billion, three hundred twenty million, nine hundred thirty-nine thousand, five hundred fifty-one".