238612770891 has 48 divisors (see below), whose sum is σ = 409008835200. Its totient is φ = 137002512240.

The previous prime is 238612770793. The next prime is 238612770917. The reversal of 238612770891 is 198077216832.

It is a happy number.

238612770891 is a `hidden beast` number, since 238 + 61 + 277 + 0 + 89 + 1 = 666.

It is not a de Polignac number, because 238612770891 - 2¹¹ = 238612768843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (238612770191) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1859961 + ... + 1984106.

It is an arithmetic number, because the mean of its divisors is an integer number (8521017400).

Almost surely, 2^238612770891 is an apocalyptic number.

238612770891 is a deficient number, since it is larger than the sum of its proper divisors (170396064309).

238612770891 is a wasteful number, since it uses less digits than its factorization.

238612770891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844117 (or 3844100 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The spelling of 238612770891 in words is "two hundred thirty-eight billion, six hundred twelve million, seven hundred seventy thousand, eight hundred ninety-one".