23278238681 has 8 divisors (see below), whose sum is σ = 23616334560. Its totient is φ = 22941515232.

The previous prime is 23278238657. The next prime is 23278238693. The reversal of 23278238681 is 18683287232.

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

It is a cyclic number.

It is not a de Polignac number, because 23278238681 - 2⁶ = 23278238617 is a prime.

It is a super-4 number, since 4×23278238681⁴ (a number of 43 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23278238611) 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, 308915 + ... + 376808.

It is an arithmetic number, because the mean of its divisors is an integer number (2952041820).

Almost surely, 2^23278238681 is an apocalyptic number.

It is an amenable number.

23278238681 is a deficient number, since it is larger than the sum of its proper divisors (338095879).

23278238681 is an equidigital number, since it uses as much as digits as its factorization.

23278238681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686215.

The product of its digits is 1548288, while the sum is 50.

The spelling of 23278238681 in words is "twenty-three billion, two hundred seventy-eight million, two hundred thirty-eight thousand, six hundred eighty-one".