5815291491 has 12 divisors (see below), whose sum is σ = 8595211768. Its totient is φ = 3786701184.

The previous prime is 5815291481. The next prime is 5815291511. The reversal of 5815291491 is 1941925185.

5815291491 is a `hidden beast` number, since 5 + 8 + 152 + 9 + 1 + 491 = 666.

It is not a de Polignac number, because 5815291491 - 2¹¹ = 5815289443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5815291421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7512910 + ... + 7513683.

Almost surely, 2^5815291491 is an apocalyptic number.

5815291491 is a deficient number, since it is larger than the sum of its proper divisors (2779920277).

5815291491 is a wasteful number, since it uses less digits than its factorization.

5815291491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15026642 (or 15026639 counting only the distinct ones).

The product of its digits is 129600, while the sum is 45.

The square root of 5815291491 is about 76258.0585315414. The cubic root of 5815291491 is about 1798.2793733633.

The spelling of 5815291491 in words is "five billion, eight hundred fifteen million, two hundred ninety-one thousand, four hundred ninety-one".