40643957554019 has 2 divisors, whose sum is σ = 40643957554020. Its totient is φ = 40643957554018.

The previous prime is 40643957554007. The next prime is 40643957554129. The reversal of 40643957554019 is 91045575934604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40643957554019 - 2⁴⁴ = 23051771509603 is a prime.

It is a super-2 number, since 2×40643957554019² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (40643957554619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20321978777009 + 20321978777010.

It is an arithmetic number, because the mean of its divisors is an integer number (20321978777010).

Almost surely, 2^{40643957554019} is an apocalyptic number.

40643957554019 is a deficient number, since it is larger than the sum of its proper divisors (1).

40643957554019 is an equidigital number, since it uses as much as digits as its factorization.

40643957554019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648000, while the sum is 62.

The spelling of 40643957554019 in words is "forty trillion, six hundred forty-three billion, nine hundred fifty-seven million, five hundred fifty-four thousand, nineteen".