1099970587872 has 72 divisors (see below), whose sum is σ = 3368659936824. Its totient is φ = 338452487424.

The previous prime is 1099970587867. The next prime is 1099970587901. The reversal of 1099970587872 is 2787850799901.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 1099970587872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146894038 + ... + 146901525.

It is an arithmetic number, because the mean of its divisors is an integer number (46786943567).

Almost surely, 2^{1099970587872} is an apocalyptic number.

1099970587872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1099970587872 is an abundant number, since it is smaller than the sum of its proper divisors (2268689348952).

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

1099970587872 is a wasteful number, since it uses less digits than its factorization.

1099970587872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293795592 (or 293795581 counting only the distinct ones).

The product of its (nonzero) digits is 160030080, while the sum is 72.

The spelling of 1099970587872 in words is "one trillion, ninety-nine billion, nine hundred seventy million, five hundred eighty-seven thousand, eight hundred seventy-two".