77992131303131 has 16 divisors (see below), whose sum is σ = 80731964183040. Its totient is φ = 75255671191680.

The previous prime is 77992131303113. The next prime is 77992131303167. The reversal of 77992131303131 is 13130313129977.

It is a cyclic number.

It is not a de Polignac number, because 77992131303131 - 2⁶ = 77992131303067 is a prime.

It is a super-2 number, since 2×77992131303131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77992131303131.

It is not an unprimeable number, because it can be changed into a prime (77992131303101) 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, 489922310 + ... + 490081476.

It is an arithmetic number, because the mean of its divisors is an integer number (5045747761440).

Almost surely, 2^{77992131303131} is an apocalyptic number.

77992131303131 is a deficient number, since it is larger than the sum of its proper divisors (2739832879909).

77992131303131 is a wasteful number, since it uses less digits than its factorization.

77992131303131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169654.

The product of its (nonzero) digits is 642978, while the sum is 50.

The spelling of 77992131303131 in words is "seventy-seven trillion, nine hundred ninety-two billion, one hundred thirty-one million, three hundred three thousand, one hundred thirty-one".