74844244781 has 2 divisors, whose sum is σ = 74844244782. Its totient is φ = 74844244780.

The previous prime is 74844244757. The next prime is 74844244817. The reversal of 74844244781 is 18744244847.

Together with next prime (74844244817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74269875625 + 574369156 = 272525^2 + 23966^2 .

It is a cyclic number.

It is not a de Polignac number, because 74844244781 - 2¹⁴ = 74844228397 is a prime.

It is a super-2 number, since 2×74844244781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74844244711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37422122390 + 37422122391.

It is an arithmetic number, because the mean of its divisors is an integer number (37422122391).

Almost surely, 2^74844244781 is an apocalyptic number.

It is an amenable number.

74844244781 is a deficient number, since it is larger than the sum of its proper divisors (1).

74844244781 is an equidigital number, since it uses as much as digits as its factorization.

74844244781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6422528, while the sum is 53.

The spelling of 74844244781 in words is "seventy-four billion, eight hundred forty-four million, two hundred forty-four thousand, seven hundred eighty-one".