40154742517 has 2 divisors, whose sum is σ = 40154742518. Its totient is φ = 40154742516.

The previous prime is 40154742491. The next prime is 40154742521. The reversal of 40154742517 is 71524745104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40003600081 + 151142436 = 200009^2 + 12294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40154742517 is a prime.

It is a super-2 number, since 2×40154742517² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40154742517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40154746517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20077371258 + 20077371259.

It is an arithmetic number, because the mean of its divisors is an integer number (20077371259).

Almost surely, 2^40154742517 is an apocalyptic number.

It is an amenable number.

40154742517 is a deficient number, since it is larger than the sum of its proper divisors (1).

40154742517 is an equidigital number, since it uses as much as digits as its factorization.

40154742517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156800, while the sum is 40.

The spelling of 40154742517 in words is "forty billion, one hundred fifty-four million, seven hundred forty-two thousand, five hundred seventeen".