91114618381 has 4 divisors (see below), whose sum is σ = 95076123552. Its totient is φ = 87153113212.

The previous prime is 91114618369. The next prime is 91114618433. The reversal of 91114618381 is 18381641119.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91114618381 - 2⁵ = 91114618349 is a prime.

It is a super-2 number, since 2×91114618381² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91114648381) 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, 1980752551 + ... + 1980752596.

It is an arithmetic number, because the mean of its divisors is an integer number (23769030888).

Almost surely, 2^91114618381 is an apocalyptic number.

It is an amenable number.

91114618381 is a deficient number, since it is larger than the sum of its proper divisors (3961505171).

91114618381 is a wasteful number, since it uses less digits than its factorization.

91114618381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3961505170.

The product of its digits is 41472, while the sum is 43.

The spelling of 91114618381 in words is "ninety-one billion, one hundred fourteen million, six hundred eighteen thousand, three hundred eighty-one".