91487242668 has 12 divisors (see below), whose sum is σ = 213470232920. Its totient is φ = 30495747552.

The previous prime is 91487242661. The next prime is 91487242681. The reversal of 91487242668 is 86624278419.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (91487242661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3811968433 + ... + 3811968456.

Almost surely, 2^91487242668 is an apocalyptic number.

It is an amenable number.

91487242668 is an abundant number, since it is smaller than the sum of its proper divisors (121982990252).

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

91487242668 is a wasteful number, since it uses less digits than its factorization.

91487242668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7623936896 (or 7623936894 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The spelling of 91487242668 in words is "ninety-one billion, four hundred eighty-seven million, two hundred forty-two thousand, six hundred sixty-eight".