91896333840 has 100 divisors (see below), whose sum is σ = 319169604204. Its totient is φ = 24505687296.

The previous prime is 91896333833. The next prime is 91896333847. The reversal of 91896333840 is 4833369819.

It is an interprime number because it is at equal distance from previous prime (91896333833) and next prime (91896333847).

It can be written as a sum of positive squares in 2 ways, for example, as 15912308736 + 75984025104 = 126144^2 + 275652^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (91896333847) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7084287 + ... + 7097246.

Almost surely, 2^91896333840 is an apocalyptic number.

91896333840 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

91896333840 is an abundant number, since it is smaller than the sum of its proper divisors (227273270364).

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

91896333840 is a wasteful number, since it uses less digits than its factorization.

91896333840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14181558 (or 14181543 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The spelling of 91896333840 in words is "ninety-one billion, eight hundred ninety-six million, three hundred thirty-three thousand, eight hundred forty".