40672206397 has 2 divisors, whose sum is σ = 40672206398. Its totient is φ = 40672206396.

The previous prime is 40672206343. The next prime is 40672206431. The reversal of 40672206397 is 79360227604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33675553081 + 6996653316 = 183509^2 + 83646^2 .

It is a cyclic number.

It is not a de Polignac number, because 40672206397 - 2¹⁹ = 40671682109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40672206697) 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, 20336103198 + 20336103199.

It is an arithmetic number, because the mean of its divisors is an integer number (20336103199).

Almost surely, 2^40672206397 is an apocalyptic number.

It is an amenable number.

40672206397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40672206397 is an equidigital number, since it uses as much as digits as its factorization.

40672206397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 46.

The spelling of 40672206397 in words is "forty billion, six hundred seventy-two million, two hundred six thousand, three hundred ninety-seven".