374138965561 has 9 divisors (see below), whose sum is σ = 377548978989. Its totient is φ = 370759494336.

The previous prime is 374138965553. The next prime is 374138965609. The reversal of 374138965561 is 165569831473.

The square root of 374138965561 is 611669.

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

It can be written as a sum of positive squares in 4 ways, for example, as 248383621161 + 125755344400 = 498381^2 + 354620^2 .

It is not a de Polignac number, because 374138965561 - 2³ = 374138965553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 374138965496 and 374138965505.

It is not an unprimeable number, because it can be changed into a prime (374138965961) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 69115891 + ... + 69121303.

Almost surely, 2^374138965561 is an apocalyptic number.

374138965561 is the 611669-th square number.

374138965561 is the 305835-th centered octagonal number.

It is an amenable number.

374138965561 is a deficient number, since it is larger than the sum of its proper divisors (3410013428).

374138965561 is an frugal number, since it uses more digits than its factorization.

374138965561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11052 (or 5526 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 58.

The spelling of 374138965561 in words is "three hundred seventy-four billion, one hundred thirty-eight million, nine hundred sixty-five thousand, five hundred sixty-one".