238108908645 has 24 divisors (see below), whose sum is σ = 412757323992. Its totient is φ = 126980582400.

The previous prime is 238108908641. The next prime is 238108908673. The reversal of 238108908645 is 546809801832.

It can be written as a sum of positive squares in 4 ways, for example, as 17811037764 + 220297870881 = 133458^2 + 469359^2 .

It is not a de Polignac number, because 238108908645 - 2² = 238108908641 is a prime.

It is a super-2 number, since 2×238108908645² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 238108908591 and 238108908600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238108908641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322125 + ... + 761565.

It is an arithmetic number, because the mean of its divisors is an integer number (17198221833).

Almost surely, 2^238108908645 is an apocalyptic number.

It is an amenable number.

238108908645 is a deficient number, since it is larger than the sum of its proper divisors (174648415347).

238108908645 is a wasteful number, since it uses less digits than its factorization.

238108908645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451493 (or 451490 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 238108908645 in words is "two hundred thirty-eight billion, one hundred eight million, nine hundred eight thousand, six hundred forty-five".