78881593140 has 144 divisors (see below), whose sum is σ = 274089623808. Its totient is φ = 17988314112.

The previous prime is 78881593129. The next prime is 78881593159. The reversal of 78881593140 is 4139518887.

78881593140 is a `hidden beast` number, since 7 + 8 + 8 + 8 + 1 + 593 + 1 + 40 = 666.

It is a super-3 number, since 3×78881593140³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 473289 + ... + 617871.

Almost surely, 2^78881593140 is an apocalyptic number.

78881593140 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78881593140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137044811904).

78881593140 is an abundant number, since it is smaller than the sum of its proper divisors (195208030668).

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

78881593140 is a wasteful number, since it uses less digits than its factorization.

78881593140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145038 (or 145033 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The spelling of 78881593140 in words is "seventy-eight billion, eight hundred eighty-one million, five hundred ninety-three thousand, one hundred forty".