1591141136 has 40 divisors (see below), whose sum is σ = 3322417560. Its totient is φ = 733833216.

The previous prime is 1591141121. The next prime is 1591141157. The reversal of 1591141136 is 6311411951.

It can be written as a sum of positive squares in 4 ways, for example, as 557904400 + 1033236736 = 23620^2 + 32144^2 .

It is a super-2 number, since 2×1591141136² = 5063460229342740992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 478616 + ... + 481928.

It is an arithmetic number, because the mean of its divisors is an integer number (83060439).

Almost surely, 2^1591141136 is an apocalyptic number.

1591141136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1591141136 is an abundant number, since it is smaller than the sum of its proper divisors (1731276424).

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

1591141136 is a wasteful number, since it uses less digits than its factorization.

1591141136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643 (or 5637 counting only the distinct ones).

The product of its digits is 3240, while the sum is 32.

The square root of 1591141136 is about 39889.1104939682. The cubic root of 1591141136 is about 1167.4444760814. Note that the first 4 decimals are identical.

The spelling of 1591141136 in words is "one billion, five hundred ninety-one million, one hundred forty-one thousand, one hundred thirty-six".