40271900821 has 2 divisors, whose sum is σ = 40271900822. Its totient is φ = 40271900820.

The previous prime is 40271900783. The next prime is 40271900857. The reversal of 40271900821 is 12800917204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24550502596 + 15721398225 = 156686^2 + 125385^2 .

It is a cyclic number.

It is not a de Polignac number, because 40271900821 - 2⁹ = 40271900309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40271900881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20135950410 + 20135950411.

It is an arithmetic number, because the mean of its divisors is an integer number (20135950411).

Almost surely, 2^40271900821 is an apocalyptic number.

It is an amenable number.

40271900821 is a deficient number, since it is larger than the sum of its proper divisors (1).

40271900821 is an equidigital number, since it uses as much as digits as its factorization.

40271900821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 40271900821 in words is "forty billion, two hundred seventy-one million, nine hundred thousand, eight hundred twenty-one".