25285863434 has 32 divisors (see below), whose sum is σ = 42208750080. Its totient is φ = 11281953600.

The previous prime is 25285863409. The next prime is 25285863481. The reversal of 25285863434 is 43436858252.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766472 + ... + 798780.

It is an arithmetic number, because the mean of its divisors is an integer number (1319023440).

Almost surely, 2^25285863434 is an apocalyptic number.

25285863434 is a deficient number, since it is larger than the sum of its proper divisors (16922886646).

25285863434 is a wasteful number, since it uses less digits than its factorization.

25285863434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33326.

The product of its digits is 5529600, while the sum is 50.

The spelling of 25285863434 in words is "twenty-five billion, two hundred eighty-five million, eight hundred sixty-three thousand, four hundred thirty-four".