91764290330639 has 8 divisors (see below), whose sum is σ = 91940767184640. Its totient is φ = 91587817368216.

The previous prime is 91764290330633. The next prime is 91764290330701. The reversal of 91764290330639 is 93603309246719.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91764290330639 - 2⁴ = 91764290330623 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 (91764290330633) 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, 48665114 + ... + 50515560.

It is an arithmetic number, because the mean of its divisors is an integer number (11492595898080).

Almost surely, 2^{91764290330639} is an apocalyptic number.

91764290330639 is a deficient number, since it is larger than the sum of its proper divisors (176476854001).

91764290330639 is a wasteful number, since it uses less digits than its factorization.

91764290330639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1945789.

The product of its (nonzero) digits is 39680928, while the sum is 62.

The spelling of 91764290330639 in words is "ninety-one trillion, seven hundred sixty-four billion, two hundred ninety million, three hundred thirty thousand, six hundred thirty-nine".