91289102439544 has 8 divisors (see below), whose sum is σ = 171167067074160. Its totient is φ = 45644551219768.

The previous prime is 91289102439511. The next prime is 91289102439551. The reversal of 91289102439544 is 44593420198219.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5705568902464 + ... + 5705568902479.

It is an arithmetic number, because the mean of its divisors is an integer number (21395883384270).

Almost surely, 2^{91289102439544} is an apocalyptic number.

It is an amenable number.

91289102439544 is a deficient number, since it is larger than the sum of its proper divisors (79877964634616).

91289102439544 is a wasteful number, since it uses less digits than its factorization.

91289102439544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11411137804949 (or 11411137804945 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 61.

The spelling of 91289102439544 in words is "ninety-one trillion, two hundred eighty-nine billion, one hundred two million, four hundred thirty-nine thousand, five hundred forty-four".