1805915516252 has 12 divisors (see below), whose sum is σ = 3297758768976. Its totient is φ = 863698725120.

The previous prime is 1805915516203. The next prime is 1805915516267. The reversal of 1805915516252 is 2526155195081.

It is a super-2 number, since 2×1805915516252² (a number of 25 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 1805915516252.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9814758149 + ... + 9814758332.

It is an arithmetic number, because the mean of its divisors is an integer number (274813230748).

Almost surely, 2^{1805915516252} is an apocalyptic number.

It is an amenable number.

1805915516252 is a deficient number, since it is larger than the sum of its proper divisors (1491843252724).

1805915516252 is a wasteful number, since it uses less digits than its factorization.

1805915516252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19629516508 (or 19629516506 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 50.

The spelling of 1805915516252 in words is "one trillion, eight hundred five billion, nine hundred fifteen million, five hundred sixteen thousand, two hundred fifty-two".