8269426186921 has 9 divisors (see below), whose sum is σ = 8335420607901. Its totient is φ = 8203950261612.

The previous prime is 8269426186873. The next prime is 8269426186999. The reversal of 8269426186921 is 1296816249628.

The square root of 8269426186921 is 2875661.

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

It is not a de Polignac number, because 8269426186921 - 2²⁵ = 8269392632489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8269426186121) 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, 365197626 + ... + 365220268.

Almost surely, 2^{8269426186921} is an apocalyptic number.

8269426186921 is the 2875661-st square number.

8269426186921 is the 1437831-st centered octagonal number.

It is an amenable number.

8269426186921 is a deficient number, since it is larger than the sum of its proper divisors (65994420980).

8269426186921 is an frugal number, since it uses more digits than its factorization.

8269426186921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45540 (or 22770 counting only the distinct ones).

The product of its digits is 35831808, while the sum is 64.

Multiplying 8269426186921 by its sum of digits (64), we get a square (529243275962944 = 23005288²).

The spelling of 8269426186921 in words is "eight trillion, two hundred sixty-nine billion, four hundred twenty-six million, one hundred eighty-six thousand, nine hundred twenty-one".