237638993664 has 144 divisors (see below), whose sum is σ = 666102644480. Its totient is φ = 75004600320.

The previous prime is 237638993663. The next prime is 237638993671. The reversal of 237638993664 is 466399836732.

It is a junction number, because it is equal to n+sod(n) for n = 237638993595 and 237638993604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (237638993663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42124284 + ... + 42129924.

Almost surely, 2^237638993664 is an apocalyptic number.

237638993664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 237638993664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333051322240).

237638993664 is an abundant number, since it is smaller than the sum of its proper divisors (428463650816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

237638993664 is a wasteful number, since it uses less digits than its factorization.

237638993664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8566 (or 8552 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 66.

The spelling of 237638993664 in words is "two hundred thirty-seven billion, six hundred thirty-eight million, nine hundred ninety-three thousand, six hundred sixty-four".