731669243136 has 288 divisors, whose sum is σ = 2170513527168. Its totient is φ = 217361940480.

The previous prime is 731669243111. The next prime is 731669243141. The reversal of 731669243136 is 631342966137.

It is a super-2 number, since 2×731669243136² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39697155 + ... + 39715581.

Almost surely, 2^731669243136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 731669243136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1085256763584).

731669243136 is an abundant number, since it is smaller than the sum of its proper divisors (1438844284032).

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

731669243136 is a wasteful number, since it uses less digits than its factorization.

731669243136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18597 (or 18583 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 51.

The spelling of 731669243136 in words is "seven hundred thirty-one billion, six hundred sixty-nine million, two hundred forty-three thousand, one hundred thirty-six".