3621930440769 has 27 divisors (see below), whose sum is σ = 5356536761667. Its totient is φ = 2358306470016.

The previous prime is 3621930440731. The next prime is 3621930440813. The reversal of 3621930440769 is 9670440391263.

It is a happy number.

The square root of 3621930440769 is 1903137.

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

3621930440769 is a `hidden beast` number, since 3 + 6 + 2 + 193 + 0 + 440 + 7 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1777462236225 + 1844468204544 = 1333215^2 + 1358112^2 .

It is not a de Polignac number, because 3621930440769 - 2⁷ = 3621930440641 is a prime.

It is a super-2 number, since 2×3621930440769² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3621930441769) 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, 245497297 + ... + 245512049.

Almost surely, 2^{3621930440769} is an apocalyptic number.

3621930440769 is the 1903137-th square number.

3621930440769 is the 951569-th centered octagonal number.

It is an amenable number.

3621930440769 is a deficient number, since it is larger than the sum of its proper divisors (1734606320898).

3621930440769 is an frugal number, since it uses more digits than its factorization.

3621930440769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29598 (or 14799 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 54.

The spelling of 3621930440769 in words is "three trillion, six hundred twenty-one billion, nine hundred thirty million, four hundred forty thousand, seven hundred sixty-nine".