91886055766742 has 32 divisors (see below), whose sum is σ = 146042254647072. Its totient is φ = 43209217419264.

The previous prime is 91886055766663. The next prime is 91886055766751. The reversal of 91886055766742 is 24766755068819.

It is a self number, because there is not a number n which added to its sum of digits gives 91886055766742.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1580045138 + ... + 1580103290.

It is an arithmetic number, because the mean of its divisors is an integer number (4563820457721).

Almost surely, 2^{91886055766742} is an apocalyptic number.

91886055766742 is a deficient number, since it is larger than the sum of its proper divisors (54156198880330).

91886055766742 is a wasteful number, since it uses less digits than its factorization.

91886055766742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90992.

The product of its (nonzero) digits is 1219276800, while the sum is 74.

The spelling of 91886055766742 in words is "ninety-one trillion, eight hundred eighty-six billion, fifty-five million, seven hundred sixty-six thousand, seven hundred forty-two".