25551382464 has 84 divisors (see below), whose sum is σ = 75601007040. Its totient is φ = 8242375680.

The previous prime is 25551382429. The next prime is 25551382481. The reversal of 25551382464 is 46428315552.

25551382464 is a `hidden beast` number, since 2 + 5 + 55 + 138 + 2 + 464 = 666.

It is a super-2 number, since 2×25551382464² (a number of 22 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 11 ways as a sum of consecutive naturals, for example, 697629 + ... + 733340.

Almost surely, 2^25551382464 is an apocalyptic number.

25551382464 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25551382464 is an abundant number, since it is smaller than the sum of its proper divisors (50049624576).

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

25551382464 is a wasteful number, since it uses less digits than its factorization.

25551382464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431018 (or 1431005 counting only the distinct ones).

The product of its digits is 1152000, while the sum is 45.

The spelling of 25551382464 in words is "twenty-five billion, five hundred fifty-one million, three hundred eighty-two thousand, four hundred sixty-four".