25171220552 has 8 divisors (see below), whose sum is σ = 47196038550. Its totient is φ = 12585610272.

The previous prime is 25171220537. The next prime is 25171220617. The reversal of 25171220552 is 25502217152.

It can be written as a sum of positive squares in only one way, i.e., 15493776676 + 9677443876 = 124474^2 + 98374^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1573201277 + ... + 1573201292.

Almost surely, 2^25171220552 is an apocalyptic number.

It is an amenable number.

25171220552 is a deficient number, since it is larger than the sum of its proper divisors (22024817998).

25171220552 is a wasteful number, since it uses less digits than its factorization.

25171220552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3146402575 (or 3146402571 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The spelling of 25171220552 in words is "twenty-five billion, one hundred seventy-one million, two hundred twenty thousand, five hundred fifty-two".