72942928573 has 4 divisors (see below), whose sum is σ = 73116190108. Its totient is φ = 72769667040.

The previous prime is 72942928567. The next prime is 72942928589. The reversal of 72942928573 is 37582924927.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2931356164 + 70011572409 = 54142^2 + 264597^2 .

It is a cyclic number.

It is not a de Polignac number, because 72942928573 - 2¹³ = 72942920381 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 (72942928543) 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, 86630136 + ... + 86630977.

It is an arithmetic number, because the mean of its divisors is an integer number (18279047527).

Almost surely, 2^72942928573 is an apocalyptic number.

It is an amenable number.

72942928573 is a deficient number, since it is larger than the sum of its proper divisors (173261535).

72942928573 is a wasteful number, since it uses less digits than its factorization.

72942928573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173261534.

The product of its digits is 15240960, while the sum is 58.

The spelling of 72942928573 in words is "seventy-two billion, nine hundred forty-two million, nine hundred twenty-eight thousand, five hundred seventy-three".