1991513096 has 16 divisors (see below), whose sum is σ = 3750835200. Its totient is φ = 991290384.

The previous prime is 1991513071. The next prime is 1991513141. The reversal of 1991513096 is 6903151991.

It is a super-2 number, since 2×1991513096² = 7932248823079010432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556376 + ... + 559943.

It is an arithmetic number, because the mean of its divisors is an integer number (234427200).

Almost surely, 2^1991513096 is an apocalyptic number.

It is an amenable number.

1991513096 is a deficient number, since it is larger than the sum of its proper divisors (1759322104).

1991513096 is a wasteful number, since it uses less digits than its factorization.

1991513096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116548 (or 1116544 counting only the distinct ones).

The product of its (nonzero) digits is 65610, while the sum is 44.

The square root of 1991513096 is about 44626.3722029923. The cubic root of 1991513096 is about 1258.1363849630.

The spelling of 1991513096 in words is "one billion, nine hundred ninety-one million, five hundred thirteen thousand, ninety-six".