91694501720 has 64 divisors (see below), whose sum is σ = 208979377920. Its totient is φ = 36206146944.

The previous prime is 91694501687. The next prime is 91694501729. The reversal of 91694501720 is 2710549619.

It is a Cunningham number, because it is equal to 302811²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91694501729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1173389 + ... + 1249091.

It is an arithmetic number, because the mean of its divisors is an integer number (3265302780).

Almost surely, 2^91694501720 is an apocalyptic number.

It is an amenable number.

91694501720 is an abundant number, since it is smaller than the sum of its proper divisors (117284876200).

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

91694501720 is a wasteful number, since it uses less digits than its factorization.

91694501720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76104 (or 76100 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 91694501720 in words is "ninety-one billion, six hundred ninety-four million, five hundred one thousand, seven hundred twenty".