25200778857 has 16 divisors (see below), whose sum is σ = 33787648512. Its totient is φ = 16707450240.

The previous prime is 25200778831. The next prime is 25200778873. The reversal of 25200778857 is 75887700252.

It is not a de Polignac number, because 25200778857 - 2¹² = 25200774761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25200778807) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403848 + ... + 462054.

It is an arithmetic number, because the mean of its divisors is an integer number (2111728032).

Almost surely, 2^25200778857 is an apocalyptic number.

It is an amenable number.

25200778857 is a deficient number, since it is larger than the sum of its proper divisors (8586869655).

25200778857 is a wasteful number, since it uses less digits than its factorization.

25200778857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59008.

The product of its (nonzero) digits is 2195200, while the sum is 51.

The spelling of 25200778857 in words is "twenty-five billion, two hundred million, seven hundred seventy-eight thousand, eight hundred fifty-seven".