91126388918 has 16 divisors (see below), whose sum is σ = 137294447040. Its totient is φ = 45361665216.

The previous prime is 91126388911. The next prime is 91126388971. The reversal of 91126388918 is 81988362119.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91126388911) 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, 2195930 + ... + 2237042.

It is an arithmetic number, because the mean of its divisors is an integer number (8580902940).

Almost surely, 2^91126388918 is an apocalyptic number.

91126388918 is a deficient number, since it is larger than the sum of its proper divisors (46168058122).

91126388918 is a wasteful number, since it uses less digits than its factorization.

91126388918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45991.

The product of its digits is 1492992, while the sum is 56.

The spelling of 91126388918 in words is "ninety-one billion, one hundred twenty-six million, three hundred eighty-eight thousand, nine hundred eighteen".