40655370109 has 2 divisors, whose sum is σ = 40655370110. Its totient is φ = 40655370108.

The previous prime is 40655370083. The next prime is 40655370121. The reversal of 40655370109 is 90107355604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40570822084 + 84548025 = 201422^2 + 9195^2 .

It is a cyclic number.

It is not a de Polignac number, because 40655370109 - 2¹³ = 40655361917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40655370709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20327685054 + 20327685055.

It is an arithmetic number, because the mean of its divisors is an integer number (20327685055).

Almost surely, 2^40655370109 is an apocalyptic number.

It is an amenable number.

40655370109 is a deficient number, since it is larger than the sum of its proper divisors (1).

40655370109 is an equidigital number, since it uses as much as digits as its factorization.

40655370109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 40.

The spelling of 40655370109 in words is "forty billion, six hundred fifty-five million, three hundred seventy thousand, one hundred nine".