25902549652 has 48 divisors (see below), whose sum is σ = 52177652352. Its totient is φ = 11021552640.

The previous prime is 25902549637. The next prime is 25902549661. The reversal of 25902549652 is 25694520952.

It is a happy number.

It is a super-2 number, since 2×25902549652² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25902549596 and 25902549605.

It is a congruent number.

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, 2220828 + ... + 2232460.

It is an arithmetic number, because the mean of its divisors is an integer number (1087034424).

Almost surely, 2^25902549652 is an apocalyptic number.

It is an amenable number.

25902549652 is an abundant number, since it is smaller than the sum of its proper divisors (26275102700).

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

25902549652 is a wasteful number, since it uses less digits than its factorization.

25902549652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12208 (or 12206 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 49.

The spelling of 25902549652 in words is "twenty-five billion, nine hundred two million, five hundred forty-nine thousand, six hundred fifty-two".