1805861322732 has 36 divisors (see below), whose sum is σ = 4404845119640. Its totient is φ = 575781868992.

The previous prime is 1805861322731. The next prime is 1805861322781. The reversal of 1805861322732 is 2372231685081.

It is a super-2 number, since 2×1805861322732² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1805861322731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142232257 + ... + 142244952.

Almost surely, 2^{1805861322732} is an apocalyptic number.

1805861322732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1805861322732 is an abundant number, since it is smaller than the sum of its proper divisors (2598983796908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1805861322732 is a wasteful number, since it uses less digits than its factorization.

1805861322732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284477262 (or 284477237 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The spelling of 1805861322732 in words is "one trillion, eight hundred five billion, eight hundred sixty-one million, three hundred twenty-two thousand, seven hundred thirty-two".