91782991754 has 16 divisors (see below), whose sum is σ = 137893816320. Its totient is φ = 45818447040.

The previous prime is 91782991723. The next prime is 91782991759. The reversal of 91782991754 is 45719928719.

It is a Smith number, since the sum of its digits (62) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (91782991759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3288482 + ... + 3316274.

It is an arithmetic number, because the mean of its divisors is an integer number (8618363520).

Almost surely, 2^91782991754 is an apocalyptic number.

91782991754 is a deficient number, since it is larger than the sum of its proper divisors (46110824566).

91782991754 is a wasteful number, since it uses less digits than its factorization.

91782991754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30365.

The product of its digits is 11430720, while the sum is 62.

The spelling of 91782991754 in words is "ninety-one billion, seven hundred eighty-two million, nine hundred ninety-one thousand, seven hundred fifty-four".