630774289369 has 27 divisors (see below), whose sum is σ = 767202952383. Its totient is φ = 517051724112.

The previous prime is 630774289309. The next prime is 630774289393. The reversal of 630774289369 is 963982477036.

The square root of 630774289369 is 794213.

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., 196741038025 + 434033251344 = 443555^2 + 658812^2 .

It is not a de Polignac number, because 630774289369 - 2⁷ = 630774289241 is a prime.

It is a super-2 number, since 2×630774289369² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 630774289369.

It is not an unprimeable number, because it can be changed into a prime (630774289309) 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, 127865827 + ... + 127870759.

Almost surely, 2^630774289369 is an apocalyptic number.

630774289369 is the 794213-rd square number.

630774289369 is the 397107-th centered octagonal number.

It is an amenable number.

630774289369 is a deficient number, since it is larger than the sum of its proper divisors (136428663014).

630774289369 is an frugal number, since it uses more digits than its factorization.

630774289369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9926 (or 4963 counting only the distinct ones).

The product of its (nonzero) digits is 82301184, while the sum is 64.

Multiplying 630774289369 by its sum of digits (64), we get a square (40369554519616 = 6353704²).

The spelling of 630774289369 in words is "six hundred thirty billion, seven hundred seventy-four million, two hundred eighty-nine thousand, three hundred sixty-nine".