1161521156680 has 16 divisors (see below), whose sum is σ = 2613422602620. Its totient is φ = 464608462656.

The previous prime is 1161521156671. The next prime is 1161521156701. The reversal of 1161521156680 is 866511251611.

It can be written as a sum of positive squares in 2 ways, for example, as 1071999319876 + 89521836804 = 1035374^2 + 299202^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14519014419 + ... + 14519014498.

Almost surely, 2^{1161521156680} is an apocalyptic number.

1161521156680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161521156680 is an abundant number, since it is smaller than the sum of its proper divisors (1451901445940).

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

1161521156680 is a wasteful number, since it uses less digits than its factorization.

1161521156680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29038028928 (or 29038028924 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 43.

The spelling of 1161521156680 in words is "one trillion, one hundred sixty-one billion, five hundred twenty-one million, one hundred fifty-six thousand, six hundred eighty".