25515985452 has 24 divisors (see below), whose sum is σ = 59553209856. Its totient is φ = 8503055568.

The previous prime is 25515985447. The next prime is 25515985463. The reversal of 25515985452 is 25458951552.

It is a junction number, because it is equal to n+sod(n) for n = 25515985395 and 25515985404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237028 + ... + 327435.

It is an arithmetic number, because the mean of its divisors is an integer number (2481383744).

Almost surely, 2^25515985452 is an apocalyptic number.

It is an amenable number.

25515985452 is an abundant number, since it is smaller than the sum of its proper divisors (34037224404).

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

25515985452 is a wasteful number, since it uses less digits than its factorization.

25515985452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568237 (or 568235 counting only the distinct ones).

The product of its digits is 3600000, while the sum is 51.

The spelling of 25515985452 in words is "twenty-five billion, five hundred fifteen million, nine hundred eighty-five thousand, four hundred fifty-two".