373561772809 has 9 divisors (see below), whose sum is σ = 377512540821. Its totient is φ = 369651945600.

The previous prime is 373561772783. The next prime is 373561772813. The reversal of 373561772809 is 908277165373.

It is a happy number.

The square root of 373561772809 is 611197.

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 1671583225 + 371890189584 = 40885^2 + 609828^2 .

It is not a de Polignac number, because 373561772809 - 2³¹ = 371414289161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (373561772849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59282959 + ... + 59289259.

It is an arithmetic number, because the mean of its divisors is an integer number (41945837869).

Almost surely, 2^373561772809 is an apocalyptic number.

373561772809 is the 611197-th square number.

373561772809 is the 305599-th centered octagonal number.

It is an amenable number.

373561772809 is a deficient number, since it is larger than the sum of its proper divisors (3950768012).

373561772809 is an frugal number, since it uses more digits than its factorization.

373561772809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12796 (or 6398 counting only the distinct ones).

The product of its (nonzero) digits is 13335840, while the sum is 58.

The spelling of 373561772809 in words is "three hundred seventy-three billion, five hundred sixty-one million, seven hundred seventy-two thousand, eight hundred nine".