139616318761921 has 32 divisors (see below), whose sum is σ = 150622431897600. Its totient is φ = 129015030545280.

The previous prime is 139616318761897. The next prime is 139616318761949. The reversal of 139616318761921 is 129167813616931.

It is a cyclic number.

It is not a de Polignac number, because 139616318761921 - 2¹⁷ = 139616318630849 is a prime.

It is a super-2 number, since 2×139616318761921² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139616318761961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1333296756 + ... + 1333401466.

It is an arithmetic number, because the mean of its divisors is an integer number (4706950996800).

Almost surely, 2^{139616318761921} is an apocalyptic number.

It is an amenable number.

139616318761921 is a deficient number, since it is larger than the sum of its proper divisors (11006113135679).

139616318761921 is a wasteful number, since it uses less digits than its factorization.

139616318761921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115069.

The product of its digits is 17635968, while the sum is 64.

The spelling of 139616318761921 in words is "one hundred thirty-nine trillion, six hundred sixteen billion, three hundred eighteen million, seven hundred sixty-one thousand, nine hundred twenty-one".