40635705889 has 9 divisors (see below), whose sum is σ = 41528373427. Its totient is φ = 39761843584.

The previous prime is 40635705881. The next prime is 40635705911. The reversal of 40635705889 is 98850753604.

The square root of 40635705889 is 201583.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 38246451489 + 2389254400 = 195567^2 + 48880^2 .

It is not a de Polignac number, because 40635705889 - 2³ = 40635705881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40635705881) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9472257 + ... + 9476545.

Almost surely, 2^40635705889 is an apocalyptic number.

40635705889 is the 201583-rd square number.

40635705889 is the 100792-nd centered octagonal number.

It is an amenable number.

40635705889 is a deficient number, since it is larger than the sum of its proper divisors (892667538).

40635705889 is an frugal number, since it uses more digits than its factorization.

40635705889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8672 (or 4336 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 40635705889 in words is "forty billion, six hundred thirty-five million, seven hundred five thousand, eight hundred eighty-nine".