25278465372 has 24 divisors (see below), whose sum is σ = 58986955776. Its totient is φ = 8425602288.

The previous prime is 25278465361. The next prime is 25278465449. The reversal of 25278465372 is 27356487252.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148933 + ... + 269699.

It is an arithmetic number, because the mean of its divisors is an integer number (2457789824).

Almost surely, 2^25278465372 is an apocalyptic number.

It is an amenable number.

25278465372 is an abundant number, since it is smaller than the sum of its proper divisors (33708490404).

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

25278465372 is a wasteful number, since it uses less digits than its factorization.

25278465372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138217 (or 138215 counting only the distinct ones).

The product of its digits is 5644800, while the sum is 51.

The spelling of 25278465372 in words is "twenty-five billion, two hundred seventy-eight million, four hundred sixty-five thousand, three hundred seventy-two".