74736690781663 has 2 divisors, whose sum is σ = 74736690781664. Its totient is φ = 74736690781662.

The previous prime is 74736690781651. The next prime is 74736690781691. The reversal of 74736690781663 is 36618709663747.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74736690781663 is a prime.

It is a super-2 number, since 2×74736690781663² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74736690731663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37368345390831 + 37368345390832.

It is an arithmetic number, because the mean of its divisors is an integer number (37368345390832).

Almost surely, 2^{74736690781663} is an apocalyptic number.

74736690781663 is a deficient number, since it is larger than the sum of its proper divisors (1).

74736690781663 is an equidigital number, since it uses as much as digits as its factorization.

74736690781663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152216576, while the sum is 73.

The spelling of 74736690781663 in words is "seventy-four trillion, seven hundred thirty-six billion, six hundred ninety million, seven hundred eighty-one thousand, six hundred sixty-three".