40624165397 has 2 divisors, whose sum is σ = 40624165398. Its totient is φ = 40624165396.

The previous prime is 40624165327. The next prime is 40624165451. The reversal of 40624165397 is 79356142604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36620945956 + 4003219441 = 191366^2 + 63271^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40624165397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40624165327) 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, 20312082698 + 20312082699.

It is an arithmetic number, because the mean of its divisors is an integer number (20312082699).

Almost surely, 2^40624165397 is an apocalyptic number.

It is an amenable number.

40624165397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40624165397 is an equidigital number, since it uses as much as digits as its factorization.

40624165397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 47.

The spelling of 40624165397 in words is "forty billion, six hundred twenty-four million, one hundred sixty-five thousand, three hundred ninety-seven".