91142297352 has 108 divisors (see below), whose sum is σ = 252541067805. Its totient is φ = 29695087296.

The previous prime is 91142297347. The next prime is 91142297369. The reversal of 91142297352 is 25379224119.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

91142297352 is a `hidden beast` number, since 9 + 1 + 1 + 4 + 2 + 297 + 352 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 89859654756 + 1282642596 = 299766^2 + 35814^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=213474.

Its product of digits (272160) is a multiple of the sum of its prime factors (1620).

It is a junction number, because it is equal to n+sod(n) for n = 91142297298 and 91142297307.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 120398958 + ... + 120399714.

Almost surely, 2^91142297352 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 91142297352

91142297352 is an abundant number, since it is smaller than the sum of its proper divisors (161398770453).

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

91142297352 is an equidigital number, since it uses as much as digits as its factorization.

91142297352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 809 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The spelling of 91142297352 in words is "ninety-one billion, one hundred forty-two million, two hundred ninety-seven thousand, three hundred fifty-two".