74452864621 has 2 divisors, whose sum is σ = 74452864622. Its totient is φ = 74452864620.

The previous prime is 74452864597. The next prime is 74452864747. The reversal of 74452864621 is 12646825447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55906238025 + 18546626596 = 236445^2 + 136186^2 .

It is an emirp because it is prime and its reverse (12646825447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74452864621 - 2²⁷ = 74318646893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74452861621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37226432310 + 37226432311.

It is an arithmetic number, because the mean of its divisors is an integer number (37226432311).

Almost surely, 2^74452864621 is an apocalyptic number.

It is an amenable number.

74452864621 is a deficient number, since it is larger than the sum of its proper divisors (1).

74452864621 is an equidigital number, since it uses as much as digits as its factorization.

74452864621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2580480, while the sum is 49.

The spelling of 74452864621 in words is "seventy-four billion, four hundred fifty-two million, eight hundred sixty-four thousand, six hundred twenty-one".