91356837673 has 8 divisors (see below), whose sum is σ = 93780449280. Its totient is φ = 88942530720.

The previous prime is 91356837661. The next prime is 91356837679. The reversal of 91356837673 is 37673865319.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91356837673 - 2¹⁷ = 91356706601 is a prime.

It is a super-2 number, since 2×91356837673² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91356837679) 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, 2306265 + ... + 2345542.

It is an arithmetic number, because the mean of its divisors is an integer number (11722556160).

Almost surely, 2^91356837673 is an apocalyptic number.

It is an amenable number.

91356837673 is a deficient number, since it is larger than the sum of its proper divisors (2423611607).

91356837673 is a wasteful number, since it uses less digits than its factorization.

91356837673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652327.

The product of its digits is 17146080, while the sum is 58.

The spelling of 91356837673 in words is "ninety-one billion, three hundred fifty-six million, eight hundred thirty-seven thousand, six hundred seventy-three".