40144542517 has 2 divisors, whose sum is σ = 40144542518. Its totient is φ = 40144542516.

The previous prime is 40144542499. The next prime is 40144542589. The reversal of 40144542517 is 71524544104.

40144542517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20886319441 + 19258223076 = 144521^2 + 138774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40144542517 is a prime.

It is a super-2 number, since 2×40144542517² (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 (40144549517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20072271258 + 20072271259.

It is an arithmetic number, because the mean of its divisors is an integer number (20072271259).

Almost surely, 2^40144542517 is an apocalyptic number.

It is an amenable number.

40144542517 is a deficient number, since it is larger than the sum of its proper divisors (1).

40144542517 is an equidigital number, since it uses as much as digits as its factorization.

40144542517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89600, while the sum is 37.

The spelling of 40144542517 in words is "forty billion, one hundred forty-four million, five hundred forty-two thousand, five hundred seventeen".