1591116914 has 4 divisors (see below), whose sum is σ = 2386675374. Its totient is φ = 795558456.

The previous prime is 1591116907. The next prime is 1591116941. The reversal of 1591116914 is 4196111951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4196111951 = 3581 ⋅1171771.

It can be written as a sum of positive squares in only one way, i.e., 1462680025 + 128436889 = 38245^2 + 11333^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 397779227 + ... + 397779230.

Almost surely, 2^1591116914 is an apocalyptic number.

1591116914 is a deficient number, since it is larger than the sum of its proper divisors (795558460).

1591116914 is an equidigital number, since it uses as much as digits as its factorization.

1591116914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795558459.

The product of its digits is 9720, while the sum is 38.

The square root of 1591116914 is about 39888.8068761150. The cubic root of 1591116914 is about 1167.4385520346.

The spelling of 1591116914 in words is "one billion, five hundred ninety-one million, one hundred sixteen thousand, nine hundred fourteen".