40006064440621 has 2 divisors, whose sum is σ = 40006064440622. Its totient is φ = 40006064440620.

The previous prime is 40006064440541. The next prime is 40006064440687. The reversal of 40006064440621 is 12604446060004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36022503515625 + 3983560924996 = 6001875^2 + 1995886^2 .

It is a cyclic number.

It is not a de Polignac number, because 40006064440621 - 2¹³ = 40006064432429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40006064440421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20003032220310 + 20003032220311.

It is an arithmetic number, because the mean of its divisors is an integer number (20003032220311).

Almost surely, 2^{40006064440621} is an apocalyptic number.

It is an amenable number.

40006064440621 is a deficient number, since it is larger than the sum of its proper divisors (1).

40006064440621 is an equidigital number, since it uses as much as digits as its factorization.

40006064440621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 110592, while the sum is 37.

The spelling of 40006064440621 in words is "forty trillion, six billion, sixty-four million, four hundred forty thousand, six hundred twenty-one".