40291632481 has 2 divisors, whose sum is σ = 40291632482. Its totient is φ = 40291632480.

The previous prime is 40291632457. The next prime is 40291632529. The reversal of 40291632481 is 18423619204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34788218256 + 5503414225 = 186516^2 + 74185^2 .

It is a cyclic number.

It is not a de Polignac number, because 40291632481 - 2²¹ = 40289535329 is a prime.

It is a super-2 number, since 2×40291632481² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40291638481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20145816240 + 20145816241.

It is an arithmetic number, because the mean of its divisors is an integer number (20145816241).

Almost surely, 2^40291632481 is an apocalyptic number.

It is an amenable number.

40291632481 is a deficient number, since it is larger than the sum of its proper divisors (1).

40291632481 is an equidigital number, since it uses as much as digits as its factorization.

40291632481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 40291632481 in words is "forty billion, two hundred ninety-one million, six hundred thirty-two thousand, four hundred eighty-one".