72644330851 has 2 divisors, whose sum is σ = 72644330852. Its totient is φ = 72644330850.

The previous prime is 72644330839. The next prime is 72644330917. The reversal of 72644330851 is 15803344627.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72644330851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72644330798 and 72644330807.

It is not a weakly prime, because it can be changed into another prime (72644330821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36322165425 + 36322165426.

It is an arithmetic number, because the mean of its divisors is an integer number (36322165426).

Almost surely, 2^72644330851 is an apocalyptic number.

72644330851 is a deficient number, since it is larger than the sum of its proper divisors (1).

72644330851 is an equidigital number, since it uses as much as digits as its factorization.

72644330851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 43.

The spelling of 72644330851 in words is "seventy-two billion, six hundred forty-four million, three hundred thirty thousand, eight hundred fifty-one".