25487768646690 has 96 divisors (see below), whose sum is σ = 71173349956800. Its totient is φ = 5824493490816.

The previous prime is 25487768646677. The next prime is 25487768646719. The reversal of 25487768646690 is 9664686778452.

It is a super-2 number, since 2×25487768646690² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4781269 + ... + 8592791.

It is an arithmetic number, because the mean of its divisors is an integer number (741389062050).

Almost surely, 2^{25487768646690} is an apocalyptic number.

25487768646690 is an abundant number, since it is smaller than the sum of its proper divisors (45685581310110).

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

25487768646690 is a wasteful number, since it uses less digits than its factorization.

25487768646690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816096 (or 3816089 counting only the distinct ones).

The product of its (nonzero) digits is 5852528640, while the sum is 78.

The spelling of 25487768646690 in words is "twenty-five trillion, four hundred eighty-seven billion, seven hundred sixty-eight million, six hundred forty-six thousand, six hundred ninety".