77728670733023 has 2 divisors, whose sum is σ = 77728670733024. Its totient is φ = 77728670733022.

The previous prime is 77728670733019. The next prime is 77728670733067. The reversal of 77728670733023 is 32033707682777.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 77728670733023 - 2² = 77728670733019 is a prime.

It is a super-2 number, since 2×77728670733023² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77728670703023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38864335366511 + 38864335366512.

It is an arithmetic number, because the mean of its divisors is an integer number (38864335366512).

Almost surely, 2^{77728670733023} is an apocalyptic number.

77728670733023 is a deficient number, since it is larger than the sum of its proper divisors (1).

77728670733023 is an equidigital number, since it uses as much as digits as its factorization.

77728670733023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87127488, while the sum is 62.

The spelling of 77728670733023 in words is "seventy-seven trillion, seven hundred twenty-eight billion, six hundred seventy million, seven hundred thirty-three thousand, twenty-three".