39544341457 has 2 divisors, whose sum is σ = 39544341458. Its totient is φ = 39544341456.

The previous prime is 39544341401. The next prime is 39544341479. The reversal of 39544341457 is 75414344593.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34670067601 + 4874273856 = 186199^2 + 69816^2 .

It is a cyclic number.

It is not a de Polignac number, because 39544341457 - 2¹¹ = 39544339409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39544341457.

It is not a weakly prime, because it can be changed into another prime (39544341857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19772170728 + 19772170729.

It is an arithmetic number, because the mean of its divisors is an integer number (19772170729).

Almost surely, 2^39544341457 is an apocalyptic number.

It is an amenable number.

39544341457 is a deficient number, since it is larger than the sum of its proper divisors (1).

39544341457 is an equidigital number, since it uses as much as digits as its factorization.

39544341457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3628800, while the sum is 49.

The spelling of 39544341457 in words is "thirty-nine billion, five hundred forty-four million, three hundred forty-one thousand, four hundred fifty-seven".