77015055331 has 2 divisors, whose sum is σ = 77015055332. Its totient is φ = 77015055330.

The previous prime is 77015055289. The next prime is 77015055347. The reversal of 77015055331 is 13355051077.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77015055331 - 2²⁵ = 76981500899 is a prime.

It is a super-2 number, since 2×77015055331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77015055391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38507527665 + 38507527666.

It is an arithmetic number, because the mean of its divisors is an integer number (38507527666).

Almost surely, 2^77015055331 is an apocalyptic number.

77015055331 is a deficient number, since it is larger than the sum of its proper divisors (1).

77015055331 is an equidigital number, since it uses as much as digits as its factorization.

77015055331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55125, while the sum is 37.

The spelling of 77015055331 in words is "seventy-seven billion, fifteen million, fifty-five thousand, three hundred thirty-one".