25454639064 has 16 divisors (see below), whose sum is σ = 63636597720. Its totient is φ = 8484879680.

The previous prime is 25454639047. The next prime is 25454639071. The reversal of 25454639064 is 46093645452.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530304957 + ... + 530305004.

Almost surely, 2^25454639064 is an apocalyptic number.

25454639064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25454639064 is an abundant number, since it is smaller than the sum of its proper divisors (38181958656).

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

25454639064 is a wasteful number, since it uses less digits than its factorization.

25454639064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060609970 (or 1060609966 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 48.

The spelling of 25454639064 in words is "twenty-five billion, four hundred fifty-four million, six hundred thirty-nine thousand, sixty-four".