25649494652 has 6 divisors (see below), whose sum is σ = 44886615648. Its totient is φ = 12824747324.

The previous prime is 25649494603. The next prime is 25649494679.

25649494652 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×25649494652² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3206186828 + ... + 3206186835.

It is an arithmetic number, because the mean of its divisors is an integer number (7481102608).

Almost surely, 2^25649494652 is an apocalyptic number.

It is an amenable number.

25649494652 is a deficient number, since it is larger than the sum of its proper divisors (19237120996).

25649494652 is a wasteful number, since it uses less digits than its factorization.

25649494652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412373667 (or 6412373665 counting only the distinct ones).

The product of its digits is 18662400, while the sum is 56.

The spelling of 25649494652 in words is "twenty-five billion, six hundred forty-nine million, four hundred ninety-four thousand, six hundred fifty-two".