68647511252 has 12 divisors (see below), whose sum is σ = 126455941920. Its totient is φ = 32517242136.

The previous prime is 68647511243. The next prime is 68647511341. The reversal of 68647511252 is 25211574686.

It is a junction number, because it is equal to n+sod(n) for n = 68647511197 and 68647511206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 451628288 + ... + 451628439.

It is an arithmetic number, because the mean of its divisors is an integer number (10537995160).

Almost surely, 2^68647511252 is an apocalyptic number.

It is an amenable number.

68647511252 is a deficient number, since it is larger than the sum of its proper divisors (57808430668).

68647511252 is a wasteful number, since it uses less digits than its factorization.

68647511252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903256750 (or 903256748 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The spelling of 68647511252 in words is "sixty-eight billion, six hundred forty-seven million, five hundred eleven thousand, two hundred fifty-two".