25055052778 has 64 divisors (see below), whose sum is σ = 46654755840. Its totient is φ = 9845966592.

The previous prime is 25055052769. The next prime is 25055052787. The reversal of 25055052778 is 87725055052.

It is an interprime number because it is at equal distance from previous prime (25055052769) and next prime (25055052787).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4285125 + ... + 4290967.

It is an arithmetic number, because the mean of its divisors is an integer number (728980560).

Almost surely, 2^25055052778 is an apocalyptic number.

25055052778 is a deficient number, since it is larger than the sum of its proper divisors (21599703062).

25055052778 is a wasteful number, since it uses less digits than its factorization.

25055052778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6331.

The product of its (nonzero) digits is 980000, while the sum is 46.

The spelling of 25055052778 in words is "twenty-five billion, fifty-five million, fifty-two thousand, seven hundred seventy-eight".