1131663915 has 24 divisors (see below), whose sum is σ = 1985190480. Its totient is φ = 596280384.

The previous prime is 1131663899. The next prime is 1131663943. The reversal of 1131663915 is 5193661311.

1131663915 is a `hidden beast` number, since 1 + 1 + 3 + 1 + 6 + 639 + 15 = 666.

It is not a de Polignac number, because 1131663915 - 2⁴ = 1131663899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131663915.

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, 147760 + ... + 155229.

It is an arithmetic number, because the mean of its divisors is an integer number (82716270).

Almost surely, 2^1131663915 is an apocalyptic number.

1131663915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1131663915 is a deficient number, since it is larger than the sum of its proper divisors (853526565).

1131663915 is a wasteful number, since it uses less digits than its factorization.

1131663915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303083 (or 303080 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 1131663915 is about 33640.2127668658. The cubic root of 1131663915 is about 1042.0914259053.

The spelling of 1131663915 in words is "one billion, one hundred thirty-one million, six hundred sixty-three thousand, nine hundred fifteen".