72406631702773 has 2 divisors, whose sum is σ = 72406631702774. Its totient is φ = 72406631702772.

The previous prime is 72406631702771. The next prime is 72406631702807. The reversal of 72406631702773 is 37720713660427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46978988390884 + 25427643311889 = 6854122^2 + 5042583^2 .

It is a cyclic number.

It is not a de Polignac number, because 72406631702773 - 2¹ = 72406631702771 is a prime.

Together with 72406631702771, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72406631702771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36203315851386 + 36203315851387.

It is an arithmetic number, because the mean of its divisors is an integer number (36203315851387).

Almost surely, 2^{72406631702773} is an apocalyptic number.

It is an amenable number.

72406631702773 is a deficient number, since it is larger than the sum of its proper divisors (1).

72406631702773 is an equidigital number, since it uses as much as digits as its factorization.

72406631702773 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12446784, while the sum is 55.

The spelling of 72406631702773 in words is "seventy-two trillion, four hundred six billion, six hundred thirty-one million, seven hundred two thousand, seven hundred seventy-three".