40291632529 has 2 divisors, whose sum is σ = 40291632530. Its totient is φ = 40291632528.

The previous prime is 40291632481. The next prime is 40291632583. The reversal of 40291632529 is 92523619204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34308300625 + 5983331904 = 185225^2 + 77352^2 .

It is a cyclic number.

It is not a de Polignac number, because 40291632529 - 2³¹ = 38144148881 is a prime.

It is not a weakly prime, because it can be changed into another prime (40291635529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20145816264 + 20145816265.

It is an arithmetic number, because the mean of its divisors is an integer number (20145816265).

Almost surely, 2^40291632529 is an apocalyptic number.

It is an amenable number.

40291632529 is a deficient number, since it is larger than the sum of its proper divisors (1).

40291632529 is an equidigital number, since it uses as much as digits as its factorization.

40291632529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 40291632529 in words is "forty billion, two hundred ninety-one million, six hundred thirty-two thousand, five hundred twenty-nine".