231373488778 has 32 divisors (see below), whose sum is σ = 353260942848.
Its totient is φ = 113639526000.
The previous prime is 231373488767. The next prime is 231373488821. The reversal of 231373488778 is 877884373132.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46730203 + ... + 46735153.
It is an arithmetic number, because the mean of its divisors is an integer number (11039404464).
Almost surely, 2231373488778 is an apocalyptic number.
231373488778 is a deficient number, since it is larger than the sum of its proper divisors (121887454070).
231373488778 is a wasteful number, since it uses less digits than its factorization.
231373488778 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 6858.
The product of its digits is 37933056, while the sum is 61.
The spelling of 231373488778 in words is "two hundred thirty-one billion, three hundred seventy-three million, four hundred eighty-eight thousand, seven hundred seventy-eight".