40202611643 has 2 divisors, whose sum is σ = 40202611644. Its totient is φ = 40202611642.

The previous prime is 40202611639. The next prime is 40202611663. The reversal of 40202611643 is 34611620204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40202611643 - 2² = 40202611639 is a prime.

It is not a weakly prime, because it can be changed into another prime (40202611633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20101305821 + 20101305822.

It is an arithmetic number, because the mean of its divisors is an integer number (20101305822).

Almost surely, 2^40202611643 is an apocalyptic number.

40202611643 is a deficient number, since it is larger than the sum of its proper divisors (1).

40202611643 is an equidigital number, since it uses as much as digits as its factorization.

40202611643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 40202611643 in words is "forty billion, two hundred two million, six hundred eleven thousand, six hundred forty-three".