231870734778 has 16 divisors (see below), whose sum is σ = 465077904480. Its totient is φ = 77067505776.

The previous prime is 231870734773. The next prime is 231870734801. The reversal of 231870734778 is 877437078132.

It is not an unprimeable number, because it can be changed into a prime (231870734773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55682533 + ... + 55686696.

It is an arithmetic number, because the mean of its divisors is an integer number (29067369030).

Almost surely, 2^231870734778 is an apocalyptic number.

231870734778 is an abundant number, since it is smaller than the sum of its proper divisors (233207169702).

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

231870734778 is a wasteful number, since it uses less digits than its factorization.

231870734778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111369581.

The product of its (nonzero) digits is 11063808, while the sum is 57.

The spelling of 231870734778 in words is "two hundred thirty-one billion, eight hundred seventy million, seven hundred thirty-four thousand, seven hundred seventy-eight".