238723077681 has 48 divisors (see below), whose sum is σ = 399178091520. Its totient is φ = 136044516960.

The previous prime is 238723077673. The next prime is 238723077763. The reversal of 238723077681 is 186770327832.

It is a happy number.

It is not a de Polignac number, because 238723077681 - 2³ = 238723077673 is a prime.

It is a super-2 number, since 2×238723077681² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (238723079681) 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, 754141 + ... + 1022826.

It is an arithmetic number, because the mean of its divisors is an integer number (8316210240).

Almost surely, 2^238723077681 is an apocalyptic number.

It is an amenable number.

238723077681 is a deficient number, since it is larger than the sum of its proper divisors (160455013839).

238723077681 is a wasteful number, since it uses less digits than its factorization.

238723077681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1777066 (or 1777063 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 238723077681 in words is "two hundred thirty-eight billion, seven hundred twenty-three million, seventy-seven thousand, six hundred eighty-one".