591991392542 has 64 divisors (see below), whose sum is σ = 1015953801984. Its totient is φ = 256320599040.

The previous prime is 591991392529. The next prime is 591991392557. The reversal of 591991392542 is 245293199195.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8856398 + ... + 8922990.

It is an arithmetic number, because the mean of its divisors is an integer number (15874278156).

Almost surely, 2^591991392542 is an apocalyptic number.

591991392542 is a deficient number, since it is larger than the sum of its proper divisors (423962409442).

591991392542 is a wasteful number, since it uses less digits than its factorization.

591991392542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66873.

The product of its digits is 7873200, while the sum is 59.

The spelling of 591991392542 in words is "five hundred ninety-one billion, nine hundred ninety-one million, three hundred ninety-two thousand, five hundred forty-two".