1855955815530 has 64 divisors (see below), whose sum is σ = 4653085022208. Its totient is φ = 472881119040.

The previous prime is 1855955815487. The next prime is 1855955815541. The reversal of 1855955815530 is 355185595581.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 856966 + ... + 2108625.

It is an arithmetic number, because the mean of its divisors is an integer number (72704453472).

Almost surely, 2^{1855955815530} is an apocalyptic number.

1855955815530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1855955815530 is an abundant number, since it is smaller than the sum of its proper divisors (2797129206678).

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

1855955815530 is a wasteful number, since it uses less digits than its factorization.

1855955815530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2966531.

The product of its (nonzero) digits is 27000000, while the sum is 60.

The spelling of 1855955815530 in words is "one trillion, eight hundred fifty-five billion, nine hundred fifty-five million, eight hundred fifteen thousand, five hundred thirty".