91852747220 has 90 divisors (see below), whose sum is σ = 209486844966. Its totient is φ = 33830284800.

The previous prime is 91852747213. The next prime is 91852747229. The reversal of 91852747220 is 2274725819.

It can be written as a sum of positive squares in 15 ways, for example, as 87239892496 + 4612854724 = 295364^2 + 67918^2 .

It is a super-2 number, since 2×91852747220² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91852747229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 229059020 + ... + 229059420.

Almost surely, 2^91852747220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91852747220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104743422483).

91852747220 is an abundant number, since it is smaller than the sum of its proper divisors (117634097746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91852747220 is an frugal number, since it uses more digits than its factorization.

91852747220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863 (or 421 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 91852747220 in words is "ninety-one billion, eight hundred fifty-two million, seven hundred forty-seven thousand, two hundred twenty".