68047621408 has 48 divisors (see below), whose sum is σ = 144300446136. Its totient is φ = 31400847360.

The previous prime is 68047621393. The next prime is 68047621417. The reversal of 68047621408 is 80412674086.

It can be written as a sum of positive squares in 4 ways, for example, as 13883437584 + 54164183824 = 117828^2 + 232732^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2980918 + ... + 3003658.

Almost surely, 2^68047621408 is an apocalyptic number.

It is an amenable number.

68047621408 is an abundant number, since it is smaller than the sum of its proper divisors (76252824728).

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

68047621408 is a wasteful number, since it uses less digits than its factorization.

68047621408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29957 (or 29949 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 68047621408 in words is "sixty-eight billion, forty-seven million, six hundred twenty-one thousand, four hundred eight".