72738623379646 has 8 divisors (see below), whose sum is σ = 124694782936560. Its totient is φ = 31173695734128.

The previous prime is 72738623379641. The next prime is 72738623379647. The reversal of 72738623379646 is 64697332683727.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72738623379641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2597807977831 + ... + 2597807977858.

It is an arithmetic number, because the mean of its divisors is an integer number (15586847867070).

Almost surely, 2^{72738623379646} is an apocalyptic number.

72738623379646 is a deficient number, since it is larger than the sum of its proper divisors (51956159556914).

72738623379646 is a wasteful number, since it uses less digits than its factorization.

72738623379646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195615955698.

The product of its digits is 2304433152, while the sum is 73.

The spelling of 72738623379646 in words is "seventy-two trillion, seven hundred thirty-eight billion, six hundred twenty-three million, three hundred seventy-nine thousand, six hundred forty-six".