91366236853 has 4 divisors (see below), whose sum is σ = 94313534848. Its totient is φ = 88418938860.

The previous prime is 91366236827. The next prime is 91366236911. The reversal of 91366236853 is 35863266319.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35863266319 = 1489 ⋅24085471.

It is a cyclic number.

It is not a de Polignac number, because 91366236853 - 2¹⁷ = 91366105781 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91366236853.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91366236803) 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, 1473648951 + ... + 1473649012.

It is an arithmetic number, because the mean of its divisors is an integer number (23578383712).

Almost surely, 2^91366236853 is an apocalyptic number.

It is an amenable number.

91366236853 is a deficient number, since it is larger than the sum of its proper divisors (2947297995).

91366236853 is a wasteful number, since it uses less digits than its factorization.

91366236853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947297994.

The product of its digits is 4199040, while the sum is 52.

The spelling of 91366236853 in words is "ninety-one billion, three hundred sixty-six million, two hundred thirty-six thousand, eight hundred fifty-three".