18775264861253 has 8 divisors (see below), whose sum is σ = 19131165859608. Its totient is φ = 18419425000704.

The previous prime is 18775264861247. The next prime is 18775264861267. The reversal of 18775264861253 is 35216846257781.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2949881820484 + 15825383040769 = 1717522^2 + 3978113^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18775264861253 - 2²⁴ = 18775248084037 is a prime.

It is a super-2 number, since 2×18775264861253² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18775264861253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18775264864253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14664200 + ... + 15893057.

It is an arithmetic number, because the mean of its divisors is an integer number (2391395732451).

Almost surely, 2^{18775264861253} is an apocalyptic number.

It is an amenable number.

18775264861253 is a deficient number, since it is larger than the sum of its proper divisors (355900998355).

18775264861253 is a wasteful number, since it uses less digits than its factorization.

18775264861253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30568903.

The product of its digits is 135475200, while the sum is 65.

The spelling of 18775264861253 in words is "eighteen trillion, seven hundred seventy-five billion, two hundred sixty-four million, eight hundred sixty-one thousand, two hundred fifty-three".