25520668492 has 24 divisors (see below), whose sum is σ = 48729158352. Its totient is φ = 11598427200.

The previous prime is 25520668487. The next prime is 25520668507. The reversal of 25520668492 is 29486602552.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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, 249142 + ... + 336322.

It is an arithmetic number, because the mean of its divisors is an integer number (2030381598).

Almost surely, 2^25520668492 is an apocalyptic number.

25520668492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25520668492 is a deficient number, since it is larger than the sum of its proper divisors (23208489860).

25520668492 is a wasteful number, since it uses less digits than its factorization.

25520668492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93849 (or 93847 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 25520668492 in words is "twenty-five billion, five hundred twenty million, six hundred sixty-eight thousand, four hundred ninety-two".