238861877691 has 8 divisors (see below), whose sum is σ = 328756132864. Its totient is φ = 154104437160.

The previous prime is 238861877671. The next prime is 238861877743. The reversal of 238861877691 is 196778168832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 238861877691 - 2¹⁸ = 238861615547 is a prime.

It is a super-2 number, since 2×238861877691² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (238861877671) 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, 1284203551 + ... + 1284203736.

It is an arithmetic number, because the mean of its divisors is an integer number (41094516608).

Almost surely, 2^238861877691 is an apocalyptic number.

238861877691 is a deficient number, since it is larger than the sum of its proper divisors (89894255173).

238861877691 is a wasteful number, since it uses less digits than its factorization.

238861877691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568407321.

The product of its digits is 48771072, while the sum is 66.

The spelling of 238861877691 in words is "two hundred thirty-eight billion, eight hundred sixty-one million, eight hundred seventy-seven thousand, six hundred ninety-one".