25597602378 has 24 divisors (see below), whose sum is σ = 55547751168. Its totient is φ = 8519260392.

The previous prime is 25597602377. The next prime is 25597602383. The reversal of 25597602378 is 87320679552.

25597602378 is a `hidden beast` number, since 2 + 559 + 7 + 60 + 23 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (25597602377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1094250 + ... + 1117397.

It is an arithmetic number, because the mean of its divisors is an integer number (2314489632).

Almost surely, 2^25597602378 is an apocalyptic number.

25597602378 is an abundant number, since it is smaller than the sum of its proper divisors (29950148790).

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

25597602378 is a wasteful number, since it uses less digits than its factorization.

25597602378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212298 (or 2212295 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 25597602378 in words is "twenty-five billion, five hundred ninety-seven million, six hundred two thousand, three hundred seventy-eight".