3765613989361 has 9 divisors (see below), whose sum is σ = 4380423911499. Its totient is φ = 3227657490624.

The previous prime is 3765613989359. The next prime is 3765613989391. The reversal of 3765613989361 is 1639893165673.

The square root of 3765613989361 is 1940519.

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

It can be written as a sum of positive squares in only one way, i.e., 3458316719025 + 307297270336 = 1859655^2 + 554344^2 .

It is not a de Polignac number, because 3765613989361 - 2¹ = 3765613989359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3765613989311) 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, 13445025 + ... + 13722241.

Almost surely, 2^{3765613989361} is an apocalyptic number.

3765613989361 is the 1940519-th square number.

3765613989361 is the 970260-th centered octagonal number.

It is an amenable number.

3765613989361 is a deficient number, since it is larger than the sum of its proper divisors (614809922138).

3765613989361 is an frugal number, since it uses more digits than its factorization.

3765613989361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554448 (or 277224 counting only the distinct ones).

The product of its digits is 132269760, while the sum is 67.

The spelling of 3765613989361 in words is "three trillion, seven hundred sixty-five billion, six hundred thirteen million, nine hundred eighty-nine thousand, three hundred sixty-one".