77915270047 has 2 divisors, whose sum is σ = 77915270048. Its totient is φ = 77915270046.

The previous prime is 77915270011. The next prime is 77915270057. The reversal of 77915270047 is 74007251977.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77915270047 - 2²⁷ = 77781052319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77915270057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38957635023 + 38957635024.

It is an arithmetic number, because the mean of its divisors is an integer number (38957635024).

Almost surely, 2^77915270047 is an apocalyptic number.

77915270047 is a deficient number, since it is larger than the sum of its proper divisors (1).

77915270047 is an equidigital number, since it uses as much as digits as its factorization.

77915270047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864360, while the sum is 49.

The spelling of 77915270047 in words is "seventy-seven billion, nine hundred fifteen million, two hundred seventy thousand, forty-seven".