1855801820232 has 48 divisors (see below), whose sum is σ = 5029547028480. Its totient is φ = 618180040800.

The previous prime is 1855801820231. The next prime is 1855801820287. The reversal of 1855801820232 is 2320281085581.

1855801820232 is a `hidden beast` number, since 1 + 8 + 5 + 580 + 18 + 20 + 2 + 32 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1855801820231) 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, 8655144 + ... + 8866967.

It is an arithmetic number, because the mean of its divisors is an integer number (104782229760).

Almost surely, 2^{1855801820232} is an apocalyptic number.

1855801820232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1855801820232 is an abundant number, since it is smaller than the sum of its proper divisors (3173745208248).

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

1855801820232 is a wasteful number, since it uses less digits than its factorization.

1855801820232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17523594 (or 17523587 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 45.

The spelling of 1855801820232 in words is "one trillion, eight hundred fifty-five billion, eight hundred one million, eight hundred twenty thousand, two hundred thirty-two".