25305997938 has 64 divisors (see below), whose sum is σ = 58502207232. Its totient is φ = 7228016640.

The previous prime is 25305997931. The next prime is 25305997949. The reversal of 25305997938 is 83979950352.

It is not an unprimeable number, because it can be changed into a prime (25305997931) 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, 33918 + ... + 227513.

It is an arithmetic number, because the mean of its divisors is an integer number (914096988).

Almost surely, 2^25305997938 is an apocalyptic number.

25305997938 is an abundant number, since it is smaller than the sum of its proper divisors (33196209294).

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

25305997938 is a wasteful number, since it uses less digits than its factorization.

25305997938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261539.

The product of its (nonzero) digits is 18370800, while the sum is 60.

The spelling of 25305997938 in words is "twenty-five billion, three hundred five million, nine hundred ninety-seven thousand, nine hundred thirty-eight".