25447259064 has 64 divisors (see below), whose sum is σ = 70289130240. Its totient is φ = 7636344320.

The previous prime is 25447259027. The next prime is 25447259107. The reversal of 25447259064 is 46095274452.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1346502 + ... + 1365269.

It is an arithmetic number, because the mean of its divisors is an integer number (1098267660).

Almost surely, 2^25447259064 is an apocalyptic number.

25447259064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25447259064 is an abundant number, since it is smaller than the sum of its proper divisors (44841871176).

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

25447259064 is a wasteful number, since it uses less digits than its factorization.

25447259064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711820 (or 2711816 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 48.

The spelling of 25447259064 in words is "twenty-five billion, four hundred forty-seven million, two hundred fifty-nine thousand, sixty-four".