1091502942720 has 160 divisors (see below), whose sum is σ = 3516877191168. Its totient is φ = 288775323648.

The previous prime is 1091502942697. The next prime is 1091502942779. The reversal of 1091502942720 is 272492051901.

It is a tau number, because it is divible by the number of its divisors (160).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415822 + ... + 1534898.

Almost surely, 2^{1091502942720} is an apocalyptic number.

1091502942720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1091502942720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1758438595584).

1091502942720 is an abundant number, since it is smaller than the sum of its proper divisors (2425374248448).

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

1091502942720 is a wasteful number, since it uses less digits than its factorization.

1091502942720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119230 (or 1119214 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 1091502942720 in words is "one trillion, ninety-one billion, five hundred two million, nine hundred forty-two thousand, seven hundred twenty".