1591091738796 has 24 divisors (see below), whose sum is σ = 4242911303680. Its totient is φ = 454597639632.

The previous prime is 1591091738779. The next prime is 1591091738807. The reversal of 1591091738796 is 6978371901951.

It is a happy number.

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, 9470784076 + ... + 9470784243.

Almost surely, 2^{1591091738796} is an apocalyptic number.

It is an amenable number.

1591091738796 is an abundant number, since it is smaller than the sum of its proper divisors (2651819564884).

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

1591091738796 is a wasteful number, since it uses less digits than its factorization.

1591091738796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18941568333 (or 18941568331 counting only the distinct ones).

The product of its (nonzero) digits is 25719120, while the sum is 66.

The spelling of 1591091738796 in words is "one trillion, five hundred ninety-one billion, ninety-one million, seven hundred thirty-eight thousand, seven hundred ninety-six".