91868620548 has 48 divisors (see below), whose sum is σ = 214899608000. Its totient is φ = 30545869824.

The previous prime is 91868620531. The next prime is 91868620577. The reversal of 91868620548 is 84502686819.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21991836 + ... + 21996012.

Almost surely, 2^91868620548 is an apocalyptic number.

It is an amenable number.

91868620548 is an abundant number, since it is smaller than the sum of its proper divisors (123030987452).

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

91868620548 is a wasteful number, since it uses less digits than its factorization.

91868620548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8356 (or 8354 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 57.

The spelling of 91868620548 in words is "ninety-one billion, eight hundred sixty-eight million, six hundred twenty thousand, five hundred forty-eight".