74844644881 has 2 divisors, whose sum is σ = 74844644882. Its totient is φ = 74844644880.

The previous prime is 74844644821. The next prime is 74844644887. The reversal of 74844644881 is 18844644847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73161594256 + 1683050625 = 270484^2 + 41025^2 .

It is a cyclic number.

It is not a de Polignac number, because 74844644881 - 2¹⁵ = 74844612113 is a prime.

It is a super-2 number, since 2×74844644881² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (74844644887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37422322440 + 37422322441.

It is an arithmetic number, because the mean of its divisors is an integer number (37422322441).

Almost surely, 2^74844644881 is an apocalyptic number.

It is an amenable number.

74844644881 is a deficient number, since it is larger than the sum of its proper divisors (1).

74844644881 is an equidigital number, since it uses as much as digits as its factorization.

74844644881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22020096, while the sum is 58.

The spelling of 74844644881 in words is "seventy-four billion, eight hundred forty-four million, six hundred forty-four thousand, eight hundred eighty-one".