1080999991998 has 12 divisors (see below), whose sum is σ = 2342166649368. Its totient is φ = 360333330660.

The previous prime is 1080999991979. The next prime is 1080999992029. The reversal of 1080999991998 is 8991999990801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30027777538 + ... + 30027777573.

It is an arithmetic number, because the mean of its divisors is an integer number (195180554114).

Almost surely, 2^{1080999991998} is an apocalyptic number.

1080999991998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1080999991998 is an abundant number, since it is smaller than the sum of its proper divisors (1261166657370).

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

1080999991998 is a wasteful number, since it uses less digits than its factorization.

1080999991998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60055555119 (or 60055555116 counting only the distinct ones).

The product of its (nonzero) digits is 306110016, while the sum is 81.

The spelling of 1080999991998 in words is "one trillion, eighty billion, nine hundred ninety-nine million, nine hundred ninety-one thousand, nine hundred ninety-eight".