40200842609 has 2 divisors, whose sum is σ = 40200842610. Its totient is φ = 40200842608.

The previous prime is 40200842593. The next prime is 40200842623. The reversal of 40200842609 is 90624800204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40199047009 + 1795600 = 200497^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 40200842609 - 2⁴ = 40200842593 is a prime.

It is a super-2 number, since 2×40200842609² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40200842699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20100421304 + 20100421305.

It is an arithmetic number, because the mean of its divisors is an integer number (20100421305).

Almost surely, 2^40200842609 is an apocalyptic number.

It is an amenable number.

40200842609 is a deficient number, since it is larger than the sum of its proper divisors (1).

40200842609 is an equidigital number, since it uses as much as digits as its factorization.

40200842609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 40200842609 in words is "forty billion, two hundred million, eight hundred forty-two thousand, six hundred nine".