25546649568 has 96 divisors (see below), whose sum is σ = 74536785792. Its totient is φ = 7595328000.

The previous prime is 25546649563. The next prime is 25546649573. The reversal of 25546649568 is 86594664552.

It is an interprime number because it is at equal distance from previous prime (25546649563) and next prime (25546649573).

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25546649561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172258 + ... + 284193.

It is an arithmetic number, because the mean of its divisors is an integer number (776424852).

Almost surely, 2^25546649568 is an apocalyptic number.

It is an amenable number.

25546649568 is an abundant number, since it is smaller than the sum of its proper divisors (48990136224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25546649568 is a wasteful number, since it uses less digits than its factorization.

25546649568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456528 (or 456520 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 60.

The spelling of 25546649568 in words is "twenty-five billion, five hundred forty-six million, six hundred forty-nine thousand, five hundred sixty-eight".