231789196512 has 48 divisors (see below), whose sum is σ = 676051825680. Its totient is φ = 77263065216.

The previous prime is 231789196501. The next prime is 231789196537. The reversal of 231789196512 is 215691987132.

It is a happy number.

231789196512 is a `hidden beast` number, since 2 + 31 + 7 + 8 + 9 + 1 + 96 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×231789196512² (a number of 24 digits) contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134136403 + ... + 134138130.

It is an arithmetic number, because the mean of its divisors is an integer number (14084413035).

Almost surely, 2^231789196512 is an apocalyptic number.

It is an amenable number.

231789196512 is an abundant number, since it is smaller than the sum of its proper divisors (444262629168).

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

231789196512 is a wasteful number, since it uses less digits than its factorization.

231789196512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268274552 (or 268274538 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The spelling of 231789196512 in words is "two hundred thirty-one billion, seven hundred eighty-nine million, one hundred ninety-six thousand, five hundred twelve".