1158011631 has 24 divisors (see below), whose sum is σ = 1919867040. Its totient is φ = 658872576.

The previous prime is 1158011623. The next prime is 1158011651. The reversal of 1158011631 is 1361108511.

It is a happy number.

1158011631 is a `hidden beast` number, since 1 + 15 + 8 + 0 + 11 + 631 = 666.

It is not a de Polignac number, because 1158011631 - 2³ = 1158011623 is a prime.

It is a super-2 number, since 2×1158011631² = 2681981875062560322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1158011595 and 1158011604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158011611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24766 + ... + 54123.

It is an arithmetic number, because the mean of its divisors is an integer number (79994460).

Almost surely, 2^1158011631 is an apocalyptic number.

1158011631 is a deficient number, since it is larger than the sum of its proper divisors (761855409).

1158011631 is a wasteful number, since it uses less digits than its factorization.

1158011631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79135 (or 79132 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 1158011631 is about 34029.5699502653. The cubic root of 1158011631 is about 1050.1168822267.

The spelling of 1158011631 in words is "one billion, one hundred fifty-eight million, eleven thousand, six hundred thirty-one".