91881101148 has 24 divisors (see below), whose sum is σ = 220183540752. Its totient is φ = 29799275904.

The previous prime is 91881101107. The next prime is 91881101149. The reversal of 91881101148 is 84110118819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91881101149) 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, 103469265 + ... + 103470152.

It is an arithmetic number, because the mean of its divisors is an integer number (9174314198).

Almost surely, 2^91881101148 is an apocalyptic number.

It is an amenable number.

91881101148 is an abundant number, since it is smaller than the sum of its proper divisors (128302439604).

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

91881101148 is a wasteful number, since it uses less digits than its factorization.

91881101148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206939461 (or 206939459 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 42.

The spelling of 91881101148 in words is "ninety-one billion, eight hundred eighty-one million, one hundred one thousand, one hundred forty-eight".