71642622979 has 2 divisors, whose sum is σ = 71642622980. Its totient is φ = 71642622978.

The previous prime is 71642622949. The next prime is 71642623037. The reversal of 71642622979 is 97922624617.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71642622979 is a prime.

It is a super-2 number, since 2×71642622979² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71642622949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35821311489 + 35821311490.

It is an arithmetic number, because the mean of its divisors is an integer number (35821311490).

Almost surely, 2^71642622979 is an apocalyptic number.

71642622979 is a deficient number, since it is larger than the sum of its proper divisors (1).

71642622979 is an equidigital number, since it uses as much as digits as its factorization.

71642622979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 55.

The spelling of 71642622979 in words is "seventy-one billion, six hundred forty-two million, six hundred twenty-two thousand, nine hundred seventy-nine".