68601979947 has 32 divisors (see below), whose sum is σ = 93321216000. Its totient is φ = 44818693920.

The previous prime is 68601979867. The next prime is 68601979961. The reversal of 68601979947 is 74997910686.

It is not a de Polignac number, because 68601979947 - 2¹² = 68601975851 is a prime.

It is a super-3 number, since 3×68601979947³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (68601979247) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 18747004 + ... + 18750662.

It is an arithmetic number, because the mean of its divisors is an integer number (2916288000).

Almost surely, 2^68601979947 is an apocalyptic number.

68601979947 is a deficient number, since it is larger than the sum of its proper divisors (24719236053).

68601979947 is a wasteful number, since it uses less digits than its factorization.

68601979947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4311.

The product of its (nonzero) digits is 41150592, while the sum is 66.

The spelling of 68601979947 in words is "sixty-eight billion, six hundred one million, nine hundred seventy-nine thousand, nine hundred forty-seven".