79387544201939 has 4 divisors (see below), whose sum is σ = 79522787037624. Its totient is φ = 79252301366256.

The previous prime is 79387544201921. The next prime is 79387544201951. The reversal of 79387544201939 is 93910244578397.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 79387544201939 - 2²⁸ = 79387275766483 is a prime.

It is a super-2 number, since 2×79387544201939² (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 (79387544201969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67621416962 + ... + 67621418135.

It is an arithmetic number, because the mean of its divisors is an integer number (19880696759406).

Almost surely, 2^{79387544201939} is an apocalyptic number.

79387544201939 is a deficient number, since it is larger than the sum of its proper divisors (135242835685).

79387544201939 is a wasteful number, since it uses less digits than its factorization.

79387544201939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135242835684.

The product of its (nonzero) digits is 411505920, while the sum is 71.

The spelling of 79387544201939 in words is "seventy-nine trillion, three hundred eighty-seven billion, five hundred forty-four million, two hundred one thousand, nine hundred thirty-nine".