6372988561 has 9 divisors (see below), whose sum is σ = 6447200571. Its totient is φ = 6299623872.

The previous prime is 6372988537. The next prime is 6372988667. The reversal of 6372988561 is 1658892736.

The square root of 6372988561 is 79831.

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., 2861715025 + 3511273536 = 53495^2 + 59256^2 .

It is not a de Polignac number, because 6372988561 - 2⁵ = 6372988529 is a prime.

It is a super-2 number, since 2×6372988561² = 81229966397273701442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6372988361) 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, 7743196 + ... + 7744018.

It is an arithmetic number, because the mean of its divisors is an integer number (716355619).

Almost surely, 2^6372988561 is an apocalyptic number.

6372988561 is the 79831-st square number.

6372988561 is the 39916-th centered octagonal number.

It is an amenable number.

6372988561 is a deficient number, since it is larger than the sum of its proper divisors (74212010).

6372988561 is an frugal number, since it uses more digits than its factorization.

6372988561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 920 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 55.

The cubic root of 6372988561 is about 1854.0198502561.

The spelling of 6372988561 in words is "six billion, three hundred seventy-two million, nine hundred eighty-eight thousand, five hundred sixty-one".