1181958160 has 20 divisors (see below), whose sum is σ = 2748052908. Its totient is φ = 472783232.

The previous prime is 1181958149. The next prime is 1181958161. The reversal of 1181958160 is 618591811.

It can be written as a sum of positive squares in 2 ways, for example, as 560552976 + 621405184 = 23676^2 + 24928^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (1181958161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7387159 + ... + 7387318.

Almost surely, 2^1181958160 is an apocalyptic number.

1181958160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1181958160 is an abundant number, since it is smaller than the sum of its proper divisors (1566094748).

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

1181958160 is a wasteful number, since it uses less digits than its factorization.

1181958160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14774490 (or 14774484 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 40.

The square root of 1181958160 is about 34379.6183806627. The cubic root of 1181958160 is about 1057.3060105763.

The spelling of 1181958160 in words is "one billion, one hundred eighty-one million, nine hundred fifty-eight thousand, one hundred sixty".