40709242757 has 2 divisors, whose sum is σ = 40709242758. Its totient is φ = 40709242756.

The previous prime is 40709242703. The next prime is 40709242789. The reversal of 40709242757 is 75724290704.

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., 39700164001 + 1009078756 = 199249^2 + 31766^2 .

It is a cyclic number.

It is not a de Polignac number, because 40709242757 - 2¹⁰ = 40709241733 is a prime.

It is a super-2 number, since 2×40709242757² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40709262757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20354621378 + 20354621379.

It is an arithmetic number, because the mean of its divisors is an integer number (20354621379).

Almost surely, 2^40709242757 is an apocalyptic number.

It is an amenable number.

40709242757 is a deficient number, since it is larger than the sum of its proper divisors (1).

40709242757 is an equidigital number, since it uses as much as digits as its factorization.

40709242757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 40709242757 in words is "forty billion, seven hundred nine million, two hundred forty-two thousand, seven hundred fifty-seven".