88991543840 has 48 divisors (see below), whose sum is σ = 211581706392. Its totient is φ = 35369877504.

The previous prime is 88991543779. The next prime is 88991543869. The reversal of 88991543840 is 4834519988.

It can be written as a sum of positive squares in 4 ways, for example, as 74762871184 + 14228672656 = 273428^2 + 119284^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 88991543840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1746209 + ... + 1796448.

Almost surely, 2^88991543840 is an apocalyptic number.

88991543840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

88991543840 is an abundant number, since it is smaller than the sum of its proper divisors (122590162552).

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

88991543840 is a wasteful number, since it uses less digits than its factorization.

88991543840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542829 (or 3542821 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 88991543840 in words is "eighty-eight billion, nine hundred ninety-one million, five hundred forty-three thousand, eight hundred forty".