104256515257 has 2 divisors, whose sum is σ = 104256515258. Its totient is φ = 104256515256.

The previous prime is 104256515201. The next prime is 104256515267. The reversal of 104256515257 is 752515652401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92020615801 + 12235899456 = 303349^2 + 110616^2 .

It is a cyclic number.

It is not a de Polignac number, because 104256515257 - 2¹¹ = 104256513209 is a prime.

It is not a weakly prime, because it can be changed into another prime (104256515267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52128257628 + 52128257629.

It is an arithmetic number, because the mean of its divisors is an integer number (52128257629).

Almost surely, 2^104256515257 is an apocalyptic number.

It is an amenable number.

104256515257 is a deficient number, since it is larger than the sum of its proper divisors (1).

104256515257 is an equidigital number, since it uses as much as digits as its factorization.

104256515257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420000, while the sum is 43.

The spelling of 104256515257 in words is "one hundred four billion, two hundred fifty-six million, five hundred fifteen thousand, two hundred fifty-seven".