72623812865 has 8 divisors (see below), whose sum is σ = 87155201448. Its totient is φ = 58094632960.

The previous prime is 72623812837. The next prime is 72623812867. The reversal of 72623812865 is 56821832627.

It can be written as a sum of positive squares in 4 ways, for example, as 9193024 + 72614619841 = 3032^2 + 269471^2 .

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

It is not a de Polignac number, because 72623812865 - 2¹⁴ = 72623796481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72623812867) 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, 478946 + ... + 612075.

It is an arithmetic number, because the mean of its divisors is an integer number (10894400181).

Almost surely, 2^72623812865 is an apocalyptic number.

It is an amenable number.

72623812865 is a deficient number, since it is larger than the sum of its proper divisors (14531388583).

72623812865 is a wasteful number, since it uses less digits than its factorization.

72623812865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104339.

The product of its digits is 1935360, while the sum is 50.

The spelling of 72623812865 in words is "seventy-two billion, six hundred twenty-three million, eight hundred twelve thousand, eight hundred sixty-five".