1855981480918 has 8 divisors (see below), whose sum is σ = 2851873983000. Its totient is φ = 905356819920.

The previous prime is 1855981480891. The next prime is 1855981480987. The reversal of 1855981480918 is 8190841895581.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 11316960168 + ... + 11316960331.

It is an arithmetic number, because the mean of its divisors is an integer number (356484247875).

Almost surely, 2^{1855981480918} is an apocalyptic number.

1855981480918 is a deficient number, since it is larger than the sum of its proper divisors (995892502082).

1855981480918 is a wasteful number, since it uses less digits than its factorization.

1855981480918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22633920542.

The product of its (nonzero) digits is 33177600, while the sum is 67.

The spelling of 1855981480918 in words is "one trillion, eight hundred fifty-five billion, nine hundred eighty-one million, four hundred eighty thousand, nine hundred eighteen".