1091854901992 has 32 divisors (see below), whose sum is σ = 2083630132800. Its totient is φ = 536235341824.

The previous prime is 1091854901981. The next prime is 1091854901999. The reversal of 1091854901992 is 2991094581901.

It is not an unprimeable number, because it can be changed into a prime (1091854901999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368473 + ... + 1522984.

It is an arithmetic number, because the mean of its divisors is an integer number (65113441650).

Almost surely, 2^{1091854901992} is an apocalyptic number.

It is an amenable number.

1091854901992 is a deficient number, since it is larger than the sum of its proper divisors (991775230808).

1091854901992 is a wasteful number, since it uses less digits than its factorization.

1091854901992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1892745 (or 1892741 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 58.

The spelling of 1091854901992 in words is "one trillion, ninety-one billion, eight hundred fifty-four million, nine hundred one thousand, nine hundred ninety-two".