1161161560 has 32 divisors (see below), whose sum is σ = 2813585040. Its totient is φ = 428736384.

The previous prime is 1161161531. The next prime is 1161161567. The reversal of 1161161560 is 651611611.

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161161567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1115982 + ... + 1117021.

Almost surely, 2^1161161560 is an apocalyptic number.

1161161560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1161161560 is an abundant number, since it is smaller than the sum of its proper divisors (1652423480).

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

1161161560 is a wasteful number, since it uses less digits than its factorization.

1161161560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233027 (or 2233023 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 28.

The square root of 1161161560 is about 34075.8207531381. The cubic root of 1161161560 is about 1051.0681677059.

The spelling of 1161161560 in words is "one billion, one hundred sixty-one million, one hundred sixty-one thousand, five hundred sixty".