91489320264 has 32 divisors (see below), whose sum is σ = 228731257440. Its totient is φ = 30495379200.

The previous prime is 91489320253. The next prime is 91489320271. The reversal of 91489320264 is 46202398419.

It is a super-2 number, since 2×91489320264² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965904 + ... + 1056384.

It is an arithmetic number, because the mean of its divisors is an integer number (7147851795).

Almost surely, 2^91489320264 is an apocalyptic number.

It is an amenable number.

91489320264 is an abundant number, since it is smaller than the sum of its proper divisors (137241937176).

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

91489320264 is a wasteful number, since it uses less digits than its factorization.

91489320264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132621 (or 132617 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 91489320264 in words is "ninety-one billion, four hundred eighty-nine million, three hundred twenty thousand, two hundred sixty-four".