68611558413 has 16 divisors (see below), whose sum is σ = 91814232960. Its totient is φ = 45575169024.

The previous prime is 68611558397. The next prime is 68611558427. The reversal of 68611558413 is 31485511686.

It is not a de Polignac number, because 68611558413 - 2⁴ = 68611558397 is a prime.

It is a super-2 number, since 2×68611558413² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68611558013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1339920 + ... + 1390182.

It is an arithmetic number, because the mean of its divisors is an integer number (5738389560).

Almost surely, 2^68611558413 is an apocalyptic number.

It is an amenable number.

68611558413 is a deficient number, since it is larger than the sum of its proper divisors (23202674547).

68611558413 is a wasteful number, since it uses less digits than its factorization.

68611558413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51908.

The product of its digits is 691200, while the sum is 48.

The spelling of 68611558413 in words is "sixty-eight billion, six hundred eleven million, five hundred fifty-eight thousand, four hundred thirteen".