91187826053 has 4 divisors (see below), whose sum is σ = 91524312768. Its totient is φ = 90851339340.

The previous prime is 91187826049. The next prime is 91187826089. The reversal of 91187826053 is 35062878119.

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 91187826053 - 2² = 91187826049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91187825992 and 91187826010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91187826013) 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, 168242951 + ... + 168243492.

It is an arithmetic number, because the mean of its divisors is an integer number (22881078192).

Almost surely, 2^91187826053 is an apocalyptic number.

It is an amenable number.

91187826053 is a deficient number, since it is larger than the sum of its proper divisors (336486715).

91187826053 is a wasteful number, since it uses less digits than its factorization.

91187826053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336486714.

The product of its (nonzero) digits is 725760, while the sum is 50.

The spelling of 91187826053 in words is "ninety-one billion, one hundred eighty-seven million, eight hundred twenty-six thousand, fifty-three".