1162311561 has 24 divisors (see below), whose sum is σ = 1739724480. Its totient is φ = 746889696.

The previous prime is 1162311533. The next prime is 1162311569. The reversal of 1162311561 is 1651132611.

1162311561 is a `hidden beast` number, since 11 + 62 + 31 + 1 + 561 = 666.

It is not a de Polignac number, because 1162311561 - 2⁶ = 1162311497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1162311569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165426 + ... + 172308.

It is an arithmetic number, because the mean of its divisors is an integer number (72488520).

Almost surely, 2^1162311561 is an apocalyptic number.

It is an amenable number.

1162311561 is a deficient number, since it is larger than the sum of its proper divisors (577412919).

1162311561 is a wasteful number, since it uses less digits than its factorization.

1162311561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7565 (or 7562 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1162311561 is about 34092.6907268992. The cubic root of 1162311561 is about 1051.4150418096.

The spelling of 1162311561 in words is "one billion, one hundred sixty-two million, three hundred eleven thousand, five hundred sixty-one".