77457917297 has 2 divisors, whose sum is σ = 77457917298. Its totient is φ = 77457917296.

The previous prime is 77457917281. The next prime is 77457917311. The reversal of 77457917297 is 79271975477.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58873684321 + 18584232976 = 242639^2 + 136324^2 .

It is a cyclic number.

It is not a de Polignac number, because 77457917297 - 2⁴ = 77457917281 is a prime.

It is not a weakly prime, because it can be changed into another prime (77457917267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38728958648 + 38728958649.

It is an arithmetic number, because the mean of its divisors is an integer number (38728958649).

Almost surely, 2^77457917297 is an apocalyptic number.

It is an amenable number.

77457917297 is a deficient number, since it is larger than the sum of its proper divisors (1).

77457917297 is an equidigital number, since it uses as much as digits as its factorization.

77457917297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54454680, while the sum is 65.

The spelling of 77457917297 in words is "seventy-seven billion, four hundred fifty-seven million, nine hundred seventeen thousand, two hundred ninety-seven".