72945008643 has 8 divisors (see below), whose sum is σ = 104741550928. Its totient is φ = 44889236064.

The previous prime is 72945008597. The next prime is 72945008657. The reversal of 72945008643 is 34680054927.

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

It is not a de Polignac number, because 72945008643 - 2⁹ = 72945008131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72945008592 and 72945008601.

It is not an unprimeable number, because it can be changed into a prime (72945001643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935192380 + ... + 935192457.

It is an arithmetic number, because the mean of its divisors is an integer number (13092693866).

Almost surely, 2^72945008643 is an apocalyptic number.

72945008643 is a deficient number, since it is larger than the sum of its proper divisors (31796542285).

72945008643 is a wasteful number, since it uses less digits than its factorization.

72945008643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870384853.

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 72945008643 in words is "seventy-two billion, nine hundred forty-five million, eight thousand, six hundred forty-three".