77103015257 has 2 divisors, whose sum is σ = 77103015258. Its totient is φ = 77103015256.

The previous prime is 77103015239. The next prime is 77103015259. The reversal of 77103015257 is 75251030177.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49659448336 + 27443566921 = 222844^2 + 165661^2 .

It is a cyclic number.

It is not a de Polignac number, because 77103015257 - 2¹⁴ = 77102998873 is a prime.

Together with 77103015259, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77103015257.

It is not a weakly prime, because it can be changed into another prime (77103015259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38551507628 + 38551507629.

It is an arithmetic number, because the mean of its divisors is an integer number (38551507629).

Almost surely, 2^77103015257 is an apocalyptic number.

It is an amenable number.

77103015257 is a deficient number, since it is larger than the sum of its proper divisors (1).

77103015257 is an equidigital number, since it uses as much as digits as its factorization.

77103015257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51450, while the sum is 38.

The spelling of 77103015257 in words is "seventy-seven billion, one hundred three million, fifteen thousand, two hundred fifty-seven".