40168751429 has 2 divisors, whose sum is σ = 40168751430. Its totient is φ = 40168751428.

The previous prime is 40168751417. The next prime is 40168751443. The reversal of 40168751429 is 92415786104.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24032130529 + 16136620900 = 155023^2 + 127030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40168751429 is a prime.

It is a super-2 number, since 2×40168751429² (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 (40168751449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20084375714 + 20084375715.

It is an arithmetic number, because the mean of its divisors is an integer number (20084375715).

Almost surely, 2^40168751429 is an apocalyptic number.

It is an amenable number.

40168751429 is a deficient number, since it is larger than the sum of its proper divisors (1).

40168751429 is an equidigital number, since it uses as much as digits as its factorization.

40168751429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 40168751429 in words is "forty billion, one hundred sixty-eight million, seven hundred fifty-one thousand, four hundred twenty-nine".