1591377916 has 12 divisors (see below), whose sum is σ = 2786597632. Its totient is φ = 795207168.

The previous prime is 1591377911. The next prime is 1591377923. The reversal of 1591377916 is 6197731951.

It is a self number, because there is not a number n which added to its sum of digits gives 1591377916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591377911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112965 + ... + 126268.

Almost surely, 2^1591377916 is an apocalyptic number.

It is an amenable number.

1591377916 is a deficient number, since it is larger than the sum of its proper divisors (1195219716).

1591377916 is a wasteful number, since it uses less digits than its factorization.

1591377916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240900 (or 240898 counting only the distinct ones).

The product of its digits is 357210, while the sum is 49.

The square root of 1591377916 is about 39892.0783614993. The cubic root of 1591377916 is about 1167.5023829061.

The spelling of 1591377916 in words is "one billion, five hundred ninety-one million, three hundred seventy-seven thousand, nine hundred sixteen".