1091375613072 has 120 divisors (see below), whose sum is σ = 3171693878808. Its totient is φ = 350056857600.

The previous prime is 1091375613043. The next prime is 1091375613089. The reversal of 1091375613072 is 2703165731901.

1091375613072 is a `hidden beast` number, since 1 + 0 + 9 + 13 + 7 + 561 + 3 + 0 + 72 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 60062245776 + 1031313367296 = 245076^2 + 1015536^2 .

It is a super-2 number, since 2×1091375613072² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 835129 + ... + 1697112.

Almost surely, 2^{1091375613072} is an apocalyptic number.

1091375613072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1091375613072 is an abundant number, since it is smaller than the sum of its proper divisors (2080318265736).

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

1091375613072 is a wasteful number, since it uses less digits than its factorization.

1091375613072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532369 (or 2532360 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The spelling of 1091375613072 in words is "one trillion, ninety-one billion, three hundred seventy-five million, six hundred thirteen thousand, seventy-two".