1161318402 has 48 divisors (see below), whose sum is σ = 2564043768. Its totient is φ = 379814400.

The previous prime is 1161318397. The next prime is 1161318419. The reversal of 1161318402 is 2048131611.

It is a happy number.

1161318402 is a `hidden beast` number, since 1 + 1 + 613 + 1 + 8 + 40 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1075774401 + 85544001 = 32799^2 + 9249^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202608 + ... + 208260.

Almost surely, 2^1161318402 is an apocalyptic number.

1161318402 is an abundant number, since it is smaller than the sum of its proper divisors (1402725366).

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

1161318402 is a wasteful number, since it uses less digits than its factorization.

1161318402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875 (or 5872 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1161318402 is about 34078.1220433286. The cubic root of 1161318402 is about 1051.1154893470.

The spelling of 1161318402 in words is "one billion, one hundred sixty-one million, three hundred eighteen thousand, four hundred two".