1822599901369 has 27 divisors (see below), whose sum is σ = 2044556804199. Its totient is φ = 1623932506560.

The previous prime is 1822599901357. The next prime is 1822599901373. The reversal of 1822599901369 is 9631099952281.

The square root of 1822599901369 is 1350037.

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

It can be written as a sum of positive squares in 13 ways, for example, as 760026522025 + 1062573379344 = 871795^2 + 1030812^2 .

It is not a de Polignac number, because 1822599901369 - 2⁵ = 1822599901337 is a prime.

It is a super-2 number, since 2×1822599901369² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1822599901369.

It is not an unprimeable number, because it can be changed into a prime (1822599901769) 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, 508962159 + ... + 508965739.

Almost surely, 2^{1822599901369} is an apocalyptic number.

1822599901369 is the 1350037-th square number.

1822599901369 is the 675019-th centered octagonal number.

It is an amenable number.

1822599901369 is a deficient number, since it is larger than the sum of its proper divisors (221956902830).

1822599901369 is an frugal number, since it uses more digits than its factorization.

1822599901369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7246 (or 3623 counting only the distinct ones).

The product of its (nonzero) digits is 18895680, while the sum is 64.

Multiplying 1822599901369 by its sum of digits (64), we get a square (116646393687616 = 10800296²).

The spelling of 1822599901369 in words is "one trillion, eight hundred twenty-two billion, five hundred ninety-nine million, nine hundred one thousand, three hundred sixty-nine".