74136942961 has 27 divisors (see below), whose sum is σ = 79045107843. Its totient is φ = 69529676160.

The previous prime is 74136942949. The next prime is 74136942977. The reversal of 74136942961 is 16924963147.

The square root of 74136942961 is 272281.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 13 ways, for example, as 38506605361 + 35630337600 = 196231^2 + 188760^2 .

It is not a de Polignac number, because 74136942961 - 2¹³ = 74136934769 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74136942899 and 74136942908.

It is not an unprimeable number, because it can be changed into a prime (74136942991) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 323741995 + ... + 323742223.

Almost surely, 2^74136942961 is an apocalyptic number.

74136942961 is the 272281-st square number.

74136942961 is the 136141-st centered octagonal number.

It is an amenable number.

74136942961 is a deficient number, since it is larger than the sum of its proper divisors (4908164882).

74136942961 is an frugal number, since it uses more digits than its factorization.

74136942961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598 (or 299 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 52.

The spelling of 74136942961 in words is "seventy-four billion, one hundred thirty-six million, nine hundred forty-two thousand, nine hundred sixty-one".