1156559751872 has 56 divisors (see below), whose sum is σ = 2760960330240. Its totient is φ = 469580647680.

The previous prime is 1156559751833. The next prime is 1156559751887. The reversal of 1156559751872 is 2781579556511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67928504 + ... + 67945527.

It is an arithmetic number, because the mean of its divisors is an integer number (49302863040).

Almost surely, 2^{1156559751872} is an apocalyptic number.

It is an amenable number.

1156559751872 is an abundant number, since it is smaller than the sum of its proper divisors (1604400578368).

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

1156559751872 is a wasteful number, since it uses less digits than its factorization.

1156559751872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135874069 (or 135874059 counting only the distinct ones).

The product of its digits is 26460000, while the sum is 62.

The spelling of 1156559751872 in words is "one trillion, one hundred fifty-six billion, five hundred fifty-nine million, seven hundred fifty-one thousand, eight hundred seventy-two".