19631652769 has 9 divisors (see below), whose sum is σ = 19773479377. Its totient is φ = 19490839204.

The previous prime is 19631652767. The next prime is 19631652787. The reversal of 19631652769 is 96725613691.

The square root of 19631652769 is 140113.

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

It is not a de Polignac number, because 19631652769 - 2¹ = 19631652767 is a prime.

It is a super-2 number, since 2×19631652769² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19631652763) 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, 23398452 + ... + 23399290.

Almost surely, 2^19631652769 is an apocalyptic number.

19631652769 is the 140113-rd square number.

19631652769 is the 70057-th centered octagonal number.

It is an amenable number.

19631652769 is a deficient number, since it is larger than the sum of its proper divisors (141826608).

19631652769 is an frugal number, since it uses more digits than its factorization.

19631652769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012 (or 1006 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 55.

It can be divided in two parts, 19631 and 652769, that added together give a square (672400 = 820²).

The spelling of 19631652769 in words is "nineteen billion, six hundred thirty-one million, six hundred fifty-two thousand, seven hundred sixty-nine".