74344513081 has 2 divisors, whose sum is σ = 74344513082. Its totient is φ = 74344513080.

The previous prime is 74344513057. The next prime is 74344513157. The reversal of 74344513081 is 18031544347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68272986681 + 6071526400 = 261291^2 + 77920^2 .

It is a cyclic number.

It is not a de Polignac number, because 74344513081 - 2⁹ = 74344512569 is a prime.

It is a super-2 number, since 2×74344513081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74344513981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37172256540 + 37172256541.

It is an arithmetic number, because the mean of its divisors is an integer number (37172256541).

Almost surely, 2^74344513081 is an apocalyptic number.

It is an amenable number.

74344513081 is a deficient number, since it is larger than the sum of its proper divisors (1).

74344513081 is an equidigital number, since it uses as much as digits as its factorization.

74344513081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 40.

The spelling of 74344513081 in words is "seventy-four billion, three hundred forty-four million, five hundred thirteen thousand, eighty-one".