25233638816 has 12 divisors (see below), whose sum is σ = 49678726482. Its totient is φ = 12616819392.

The previous prime is 25233638783. The next prime is 25233638827. The reversal of 25233638816 is 61883633252.

It can be written as a sum of positive squares in only one way, i.e., 13548028816 + 11685610000 = 116396^2 + 108100^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394275575 + ... + 394275638.

Almost surely, 2^25233638816 is an apocalyptic number.

It is an amenable number.

25233638816 is a deficient number, since it is larger than the sum of its proper divisors (24445087666).

25233638816 is an equidigital number, since it uses as much as digits as its factorization.

25233638816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788551223 (or 788551215 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The spelling of 25233638816 in words is "twenty-five billion, two hundred thirty-three million, six hundred thirty-eight thousand, eight hundred sixteen".