68620595317920 has 144 divisors (see below), whose sum is σ = 237375559715112. Its totient is φ = 18048156549120.

The previous prime is 68620595317889. The next prime is 68620595317943. The reversal of 68620595317920 is 2971359502686.

68620595317920 is a `hidden beast` number, since 6 + 8 + 6 + 2 + 0 + 5 + 9 + 531 + 7 + 92 + 0 = 666.

68620595317920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 64589318415504 + 4031276902416 = 8036748^2 + 2007804^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×68620595317920² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 326286601 + ... + 326496840.

Almost surely, 2^{68620595317920} is an apocalyptic number.

68620595317920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68620595317920 is an abundant number, since it is smaller than the sum of its proper divisors (168754964397192).

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

68620595317920 is a wasteful number, since it uses less digits than its factorization.

68620595317920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652783535 (or 652783524 counting only the distinct ones).

The product of its (nonzero) digits is 48988800, while the sum is 63.

The spelling of 68620595317920 in words is "sixty-eight trillion, six hundred twenty billion, five hundred ninety-five million, three hundred seventeen thousand, nine hundred twenty".