25578518952 has 64 divisors (see below), whose sum is σ = 73216828800. Its totient is φ = 7294613760.

The previous prime is 25578518923. The next prime is 25578518981. The reversal of 25578518952 is 25981587552.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25578518923) and next prime (25578518981).

It is a junction number, because it is equal to n+sod(n) for n = 25578518892 and 25578518901.

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, 49827 + ... + 231602.

It is an arithmetic number, because the mean of its divisors is an integer number (1144012950).

Almost surely, 2^25578518952 is an apocalyptic number.

It is an amenable number.

25578518952 is an abundant number, since it is smaller than the sum of its proper divisors (47638309848).

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

25578518952 is a wasteful number, since it uses less digits than its factorization.

25578518952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281986 (or 281982 counting only the distinct ones).

The product of its digits is 10080000, while the sum is 57.

The spelling of 25578518952 in words is "twenty-five billion, five hundred seventy-eight million, five hundred eighteen thousand, nine hundred fifty-two".