231078790128 has 40 divisors (see below), whose sum is σ = 597154971600. Its totient is φ = 77000272384.

The previous prime is 231078790099. The next prime is 231078790139. The reversal of 231078790128 is 821097870132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

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, 668223 + ... + 953246.

It is an arithmetic number, because the mean of its divisors is an integer number (14928874290).

Almost surely, 2^231078790128 is an apocalyptic number.

It is an amenable number.

231078790128 is an abundant number, since it is smaller than the sum of its proper divisors (366076181472).

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

231078790128 is a wasteful number, since it uses less digits than its factorization.

231078790128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624449 (or 1624443 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The spelling of 231078790128 in words is "two hundred thirty-one billion, seventy-eight million, seven hundred ninety thousand, one hundred twenty-eight".