238097880981 has 24 divisors (see below), whose sum is σ = 344431240920. Its totient is φ = 158495731200.

The previous prime is 238097880947. The next prime is 238097880983. The reversal of 238097880981 is 189088790832.

238097880981 is a `hidden beast` number, since 2 + 380 + 97 + 8 + 80 + 98 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13074779025 + 225023101956 = 114345^2 + 474366^2 .

It is not a de Polignac number, because 238097880981 - 2²¹ = 238095783829 is a prime.

It is a super-2 number, since 2×238097880981² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238097880983) 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, 27172641 + ... + 27181401.

It is an arithmetic number, because the mean of its divisors is an integer number (14351301705).

Almost surely, 2^238097880981 is an apocalyptic number.

It is an amenable number.

238097880981 is a deficient number, since it is larger than the sum of its proper divisors (106333359939).

238097880981 is a wasteful number, since it uses less digits than its factorization.

238097880981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12917 (or 12914 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 63.

The spelling of 238097880981 in words is "two hundred thirty-eight billion, ninety-seven million, eight hundred eighty thousand, nine hundred eighty-one".