1902000191091 has 32 divisors (see below), whose sum is σ = 3404979368448. Its totient is φ = 912048042240.

The previous prime is 1902000191087. The next prime is 1902000191093. The reversal of 1902000191091 is 1901910002091.

It is not a de Polignac number, because 1902000191091 - 2² = 1902000191087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1902000191093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 316680346 + ... + 316686351.

It is an arithmetic number, because the mean of its divisors is an integer number (106405605264).

Almost surely, 2^{1902000191091} is an apocalyptic number.

1902000191091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1902000191091 is a deficient number, since it is larger than the sum of its proper divisors (1502979177357).

1902000191091 is a wasteful number, since it uses less digits than its factorization.

1902000191091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633366731.

The product of its (nonzero) digits is 1458, while the sum is 33.

The spelling of 1902000191091 in words is "one trillion, nine hundred two billion, one hundred ninety-one thousand, ninety-one".