623361977257 has 2 divisors, whose sum is σ = 623361977258. Its totient is φ = 623361977256.

The previous prime is 623361977243. The next prime is 623361977297. The reversal of 623361977257 is 752779163326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 345537054976 + 277824922281 = 587824^2 + 527091^2 .

It is a cyclic number.

It is not a de Polignac number, because 623361977257 - 2¹⁵ = 623361944489 is a prime.

It is not a weakly prime, because it can be changed into another prime (623361977297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311680988628 + 311680988629.

It is an arithmetic number, because the mean of its divisors is an integer number (311680988629).

Almost surely, 2^623361977257 is an apocalyptic number.

It is an amenable number.

623361977257 is a deficient number, since it is larger than the sum of its proper divisors (1).

623361977257 is an equidigital number, since it uses as much as digits as its factorization.

623361977257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20003760, while the sum is 58.

The spelling of 623361977257 in words is "six hundred twenty-three billion, three hundred sixty-one million, nine hundred seventy-seven thousand, two hundred fifty-seven".