91994053679 has 16 divisors (see below), whose sum is σ = 100652544000. Its totient is φ = 83385120000.

The previous prime is 91994053639. The next prime is 91994053727. The reversal of 91994053679 is 97635049919.

It is a cyclic number.

It is not a de Polignac number, because 91994053679 - 2¹² = 91994049583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91994053639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6310559 + ... + 6325119.

It is an arithmetic number, because the mean of its divisors is an integer number (6290784000).

Almost surely, 2^91994053679 is an apocalyptic number.

91994053679 is a deficient number, since it is larger than the sum of its proper divisors (8658490321).

91994053679 is a wasteful number, since it uses less digits than its factorization.

91994053679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16222.

The product of its (nonzero) digits is 16533720, while the sum is 62.

The spelling of 91994053679 in words is "ninety-one billion, nine hundred ninety-four million, fifty-three thousand, six hundred seventy-nine".