72944285865 has 128 divisors (see below), whose sum is σ = 138051164160. Its totient is φ = 32494694400.

The previous prime is 72944285819. The next prime is 72944285867. The reversal of 72944285865 is 56858244927.

It is not a de Polignac number, because 72944285865 - 2²¹ = 72942188713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72944285799 and 72944285808.

It is not an unprimeable number, because it can be changed into a prime (72944285867) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 23782062 + ... + 23785128.

It is an arithmetic number, because the mean of its divisors is an integer number (1078524720).

Almost surely, 2^72944285865 is an apocalyptic number.

It is an amenable number.

72944285865 is a deficient number, since it is larger than the sum of its proper divisors (65106878295).

72944285865 is a wasteful number, since it uses less digits than its factorization.

72944285865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303.

The product of its digits is 38707200, while the sum is 60.

The spelling of 72944285865 in words is "seventy-two billion, nine hundred forty-four million, two hundred eighty-five thousand, eight hundred sixty-five".