74785513420801 has 2 divisors, whose sum is σ = 74785513420802. Its totient is φ = 74785513420800.

The previous prime is 74785513420781. The next prime is 74785513420819. The reversal of 74785513420801 is 10802431558747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60039329735025 + 14746183685776 = 7748505^2 + 3840076^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74785513420801 is a prime.

It is a super-2 number, since 2×74785513420801² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74785513430801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37392756710400 + 37392756710401.

It is an arithmetic number, because the mean of its divisors is an integer number (37392756710401).

Almost surely, 2^{74785513420801} is an apocalyptic number.

It is an amenable number.

74785513420801 is a deficient number, since it is larger than the sum of its proper divisors (1).

74785513420801 is an equidigital number, since it uses as much as digits as its factorization.

74785513420801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7526400, while the sum is 55.

The spelling of 74785513420801 in words is "seventy-four trillion, seven hundred eighty-five billion, five hundred thirteen million, four hundred twenty thousand, eight hundred one".