25256220772 has 6 divisors (see below), whose sum is σ = 44198386358. Its totient is φ = 12628110384.

The previous prime is 25256220761. The next prime is 25256220793. The reversal of 25256220772 is 27702265252.

It can be written as a sum of positive squares in only one way, i.e., 22769602816 + 2486617956 = 150896^2 + 49866^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3157027593 + ... + 3157027600.

Almost surely, 2^25256220772 is an apocalyptic number.

It is an amenable number.

25256220772 is a deficient number, since it is larger than the sum of its proper divisors (18942165586).

25256220772 is a wasteful number, since it uses less digits than its factorization.

25256220772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6314055197 (or 6314055195 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 40.

The spelling of 25256220772 in words is "twenty-five billion, two hundred fifty-six million, two hundred twenty thousand, seven hundred seventy-two".