40208880637 has 2 divisors, whose sum is σ = 40208880638. Its totient is φ = 40208880636.

The previous prime is 40208880619. The next prime is 40208880643. The reversal of 40208880637 is 73608880204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40154548996 + 54331641 = 200386^2 + 7371^2 .

It is a cyclic number.

It is not a de Polignac number, because 40208880637 - 2²⁷ = 40074662909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40208880037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20104440318 + 20104440319.

It is an arithmetic number, because the mean of its divisors is an integer number (20104440319).

Almost surely, 2^40208880637 is an apocalyptic number.

It is an amenable number.

40208880637 is a deficient number, since it is larger than the sum of its proper divisors (1).

40208880637 is an equidigital number, since it uses as much as digits as its factorization.

40208880637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 40208880637 in words is "forty billion, two hundred eight million, eight hundred eighty thousand, six hundred thirty-seven".