40621791871 has 2 divisors, whose sum is σ = 40621791872. Its totient is φ = 40621791870.

The previous prime is 40621791853. The next prime is 40621791877. The reversal of 40621791871 is 17819712604.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40621791871 - 2³³ = 32031857279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40621791877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20310895935 + 20310895936.

It is an arithmetic number, because the mean of its divisors is an integer number (20310895936).

Almost surely, 2^40621791871 is an apocalyptic number.

40621791871 is a deficient number, since it is larger than the sum of its proper divisors (1).

40621791871 is an equidigital number, since it uses as much as digits as its factorization.

40621791871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 46.

The spelling of 40621791871 in words is "forty billion, six hundred twenty-one million, seven hundred ninety-one thousand, eight hundred seventy-one".