1161610111560 has 128 divisors (see below), whose sum is σ = 3606337468800. Its totient is φ = 299089889280.

The previous prime is 1161610111559. The next prime is 1161610111573. The reversal of 1161610111560 is 651110161611.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 416925 + ... + 1580204.

It is an arithmetic number, because the mean of its divisors is an integer number (28174511475).

Almost surely, 2^{1161610111560} is an apocalyptic number.

1161610111560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161610111560 is an abundant number, since it is smaller than the sum of its proper divisors (2444727357240).

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

1161610111560 is a wasteful number, since it uses less digits than its factorization.

1161610111560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997311 (or 1997307 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 30.

The spelling of 1161610111560 in words is "one trillion, one hundred sixty-one billion, six hundred ten million, one hundred eleven thousand, five hundred sixty".