25378944051 has 32 divisors (see below), whose sum is σ = 34935349248. Its totient is φ = 16379264160.

The previous prime is 25378944047. The next prime is 25378944083. The reversal of 25378944051 is 15044987352.

It is not a de Polignac number, because 25378944051 - 2² = 25378944047 is a prime.

It is a super-2 number, since 2×25378944051² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25378944001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19476666 + ... + 19477968.

It is an arithmetic number, because the mean of its divisors is an integer number (1091729664).

Almost surely, 2^25378944051 is an apocalyptic number.

25378944051 is a deficient number, since it is larger than the sum of its proper divisors (9556405197).

25378944051 is a wasteful number, since it uses less digits than its factorization.

25378944051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751.

The product of its (nonzero) digits is 1209600, while the sum is 48.

The spelling of 25378944051 in words is "twenty-five billion, three hundred seventy-eight million, nine hundred forty-four thousand, fifty-one".