72746818733 has 2 divisors, whose sum is σ = 72746818734. Its totient is φ = 72746818732.

The previous prime is 72746818723. The next prime is 72746818759. The reversal of 72746818733 is 33781864727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70725147364 + 2021671369 = 265942^2 + 44963^2 .

It is a cyclic number.

It is not a de Polignac number, because 72746818733 - 2⁴ = 72746818717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72746818723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36373409366 + 36373409367.

It is an arithmetic number, because the mean of its divisors is an integer number (36373409367).

Almost surely, 2^72746818733 is an apocalyptic number.

It is an amenable number.

72746818733 is a deficient number, since it is larger than the sum of its proper divisors (1).

72746818733 is an equidigital number, since it uses as much as digits as its factorization.

72746818733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9483264, while the sum is 56.

The spelling of 72746818733 in words is "seventy-two billion, seven hundred forty-six million, eight hundred eighteen thousand, seven hundred thirty-three".