1855950457790 has 64 divisors (see below), whose sum is σ = 3944474150400. Its totient is φ = 619845747840.

The previous prime is 1855950457783. The next prime is 1855950457799. The reversal of 1855950457790 is 977540595581.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1855950457799) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2976404 + ... + 3545543.

It is an arithmetic number, because the mean of its divisors is an integer number (61632408600).

Almost surely, 2^{1855950457790} is an apocalyptic number.

1855950457790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1855950457790 is an abundant number, since it is smaller than the sum of its proper divisors (2088523692610).

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

1855950457790 is a wasteful number, since it uses less digits than its factorization.

1855950457790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522177.

The product of its (nonzero) digits is 79380000, while the sum is 65.

The spelling of 1855950457790 in words is "one trillion, eight hundred fifty-five billion, nine hundred fifty million, four hundred fifty-seven thousand, seven hundred ninety".