72406670213693 has 2 divisors, whose sum is σ = 72406670213694. Its totient is φ = 72406670213692.

The previous prime is 72406670213641. The next prime is 72406670213707. The reversal of 72406670213693 is 39631207660427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66784640362969 + 5622029850724 = 8172187^2 + 2371082^2 .

It is a cyclic number.

It is not a de Polignac number, because 72406670213693 - 2³⁰ = 72405596471869 is a prime.

It is a super-2 number, since 2×72406670213693² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72406670212693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36203335106846 + 36203335106847.

It is an arithmetic number, because the mean of its divisors is an integer number (36203335106847).

Almost surely, 2^{72406670213693} is an apocalyptic number.

It is an amenable number.

72406670213693 is a deficient number, since it is larger than the sum of its proper divisors (1).

72406670213693 is an equidigital number, since it uses as much as digits as its factorization.

72406670213693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13716864, while the sum is 56.

The spelling of 72406670213693 in words is "seventy-two trillion, four hundred six billion, six hundred seventy million, two hundred thirteen thousand, six hundred ninety-three".