91827044357 has 4 divisors (see below), whose sum is σ = 92736223116. Its totient is φ = 90917865600.

The previous prime is 91827044321. The next prime is 91827044359. The reversal of 91827044357 is 75344072819.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70245671521 + 21581372836 = 265039^2 + 146906^2 .

It is a cyclic number.

It is not a de Polignac number, because 91827044357 - 2¹⁴ = 91827027973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91827044359) 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, 454589228 + ... + 454589429.

It is an arithmetic number, because the mean of its divisors is an integer number (23184055779).

Almost surely, 2^91827044357 is an apocalyptic number.

It is an amenable number.

91827044357 is a deficient number, since it is larger than the sum of its proper divisors (909178759).

91827044357 is a wasteful number, since it uses less digits than its factorization.

91827044357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909178758.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 91827044357 in words is "ninety-one billion, eight hundred twenty-seven million, forty-four thousand, three hundred fifty-seven".