77242500371513 has 2 divisors, whose sum is σ = 77242500371514. Its totient is φ = 77242500371512.

The previous prime is 77242500371459. The next prime is 77242500371521. The reversal of 77242500371513 is 31517300524277.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66648985637689 + 10593514733824 = 8163883^2 + 3254768^2 .

It is a cyclic number.

It is not a de Polignac number, because 77242500371513 - 2¹⁴ = 77242500355129 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (77242500371593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38621250185756 + 38621250185757.

It is an arithmetic number, because the mean of its divisors is an integer number (38621250185757).

Almost surely, 2^{77242500371513} is an apocalyptic number.

It is an amenable number.

77242500371513 is a deficient number, since it is larger than the sum of its proper divisors (1).

77242500371513 is an equidigital number, since it uses as much as digits as its factorization.

77242500371513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1234800, while the sum is 47.

The spelling of 77242500371513 in words is "seventy-seven trillion, two hundred forty-two billion, five hundred million, three hundred seventy-one thousand, five hundred thirteen".