40635705890 has 16 divisors (see below), whose sum is σ = 78770753208. Its totient is φ = 15003952896.

The previous prime is 40635705881. The next prime is 40635705911. The reversal of 40635705890 is 9850753604.

It is a Cunningham number, because it is equal to 201583²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 30161616241 + 10474089649 = 173671^2 + 102343^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156291047 + ... + 156291306.

Almost surely, 2^40635705890 is an apocalyptic number.

40635705890 is a deficient number, since it is larger than the sum of its proper divisors (38135047318).

40635705890 is a wasteful number, since it uses less digits than its factorization.

40635705890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312582373.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 40635705890 in words is "forty billion, six hundred thirty-five million, seven hundred five thousand, eight hundred ninety".