91247575998 has 8 divisors (see below), whose sum is σ = 182495152008. Its totient is φ = 30415858664.

The previous prime is 91247575987. The next prime is 91247576009. The reversal of 91247575998 is 89957574219.

It is an interprime number because it is at equal distance from previous prime (91247575987) and next prime (91247576009).

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

91247575998 is an admirable number.

It is a super-2 number, since 2×91247575998² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7603964661 + ... + 7603964672.

It is an arithmetic number, because the mean of its divisors is an integer number (22811894001).

Almost surely, 2^91247575998 is an apocalyptic number.

91247575998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

91247575998 is a wasteful number, since it uses less digits than its factorization.

91247575998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15207929338.

The product of its digits is 57153600, while the sum is 66.

The spelling of 91247575998 in words is "ninety-one billion, two hundred forty-seven million, five hundred seventy-five thousand, nine hundred ninety-eight".