231878751840 has 240 divisors, whose sum is σ = 823246677792. Its totient is φ = 61463494656.

The previous prime is 231878751799. The next prime is 231878751851. The reversal of 231878751840 is 48157878132.

231878751840 is a `hidden beast` number, since 2 + 3 + 1 + 8 + 7 + 87 + 518 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2110752 + ... + 2217888.

Almost surely, 2^231878751840 is an apocalyptic number.

231878751840 is a gapful number since it is divisible by the number (20) 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 231878751840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411623338896).

231878751840 is an abundant number, since it is smaller than the sum of its proper divisors (591367925952).

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

231878751840 is a wasteful number, since it uses less digits than its factorization.

231878751840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107331 (or 107314 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 231878751840 in words is "two hundred thirty-one billion, eight hundred seventy-eight million, seven hundred fifty-one thousand, eight hundred forty".