77874808031 has 2 divisors, whose sum is σ = 77874808032. Its totient is φ = 77874808030.

The previous prime is 77874807931. The next prime is 77874808057. The reversal of 77874808031 is 13080847877.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77874808031 is a prime.

It is a super-2 number, since 2×77874808031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77874804031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38937404015 + 38937404016.

It is an arithmetic number, because the mean of its divisors is an integer number (38937404016).

Almost surely, 2^77874808031 is an apocalyptic number.

77874808031 is a deficient number, since it is larger than the sum of its proper divisors (1).

77874808031 is an equidigital number, since it uses as much as digits as its factorization.

77874808031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2107392, while the sum is 53.

The spelling of 77874808031 in words is "seventy-seven billion, eight hundred seventy-four million, eight hundred eight thousand, thirty-one".