1091142564672 has 56 divisors (see below), whose sum is σ = 2895159966336. Its totient is φ = 362683813888.

The previous prime is 1091142564649. The next prime is 1091142564737. The reversal of 1091142564672 is 2764652411901.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7981848 + ... + 8117399.

Almost surely, 2^{1091142564672} is an apocalyptic number.

1091142564672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1091142564672 is an abundant number, since it is smaller than the sum of its proper divisors (1804017401664).

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

1091142564672 is a wasteful number, since it uses less digits than its factorization.

1091142564672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16099615 (or 16099605 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 1091142564672 in words is "one trillion, ninety-one billion, one hundred forty-two million, five hundred sixty-four thousand, six hundred seventy-two".