72997711779927 has 16 divisors (see below), whose sum is σ = 110794945943808. Its totient is φ = 42317514074880.

The previous prime is 72997711779893. The next prime is 72997711779983.

72997711779927 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-72997711779927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72997711779927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72997711779227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48088083418 + ... + 48088084935.

It is an arithmetic number, because the mean of its divisors is an integer number (6924684121488).

Almost surely, 2^{72997711779927} is an apocalyptic number.

72997711779927 is a deficient number, since it is larger than the sum of its proper divisors (37797234163881).

72997711779927 is a wasteful number, since it uses less digits than its factorization.

72997711779927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96176168390.

The product of its digits is 3087580356, while the sum is 84.

The spelling of 72997711779927 in words is "seventy-two trillion, nine hundred ninety-seven billion, seven hundred eleven million, seven hundred seventy-nine thousand, nine hundred twenty-seven".