40212251647 has 2 divisors, whose sum is σ = 40212251648. Its totient is φ = 40212251646.

The previous prime is 40212251623. The next prime is 40212251669. The reversal of 40212251647 is 74615221204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40212251647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40212251347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20106125823 + 20106125824.

It is an arithmetic number, because the mean of its divisors is an integer number (20106125824).

Almost surely, 2^40212251647 is an apocalyptic number.

40212251647 is a deficient number, since it is larger than the sum of its proper divisors (1).

40212251647 is an equidigital number, since it uses as much as digits as its factorization.

40212251647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 34.

The spelling of 40212251647 in words is "forty billion, two hundred twelve million, two hundred fifty-one thousand, six hundred forty-seven".