72950018389 has 4 divisors (see below), whose sum is σ = 72950568460. Its totient is φ = 72949468320.

The previous prime is 72950018387. The next prime is 72950018399. The reversal of 72950018389 is 98381005927.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 36688337764 + 36261680625 = 191542^2 + 190425^2 .

It is a cyclic number.

It is not a de Polignac number, because 72950018389 - 2¹ = 72950018387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72950018387) 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, 59659 + ... + 386599.

It is an arithmetic number, because the mean of its divisors is an integer number (18237642115).

Almost surely, 2^72950018389 is an apocalyptic number.

It is an amenable number.

72950018389 is a deficient number, since it is larger than the sum of its proper divisors (550071).

72950018389 is a wasteful number, since it uses less digits than its factorization.

72950018389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550070.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 72950018389 in words is "seventy-two billion, nine hundred fifty million, eighteen thousand, three hundred eighty-nine".