40531635009 has 64 divisors (see below), whose sum is σ = 62515200000. Its totient is φ = 25949576016.

The previous prime is 40531634971. The next prime is 40531635049. The reversal of 40531635009 is 90053613504.

40531635009 is a `hidden beast` number, since 40 + 53 + 1 + 63 + 500 + 9 = 666.

It is not a de Polignac number, because 40531635009 - 2²⁰ = 40530586433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40531635049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 169588312 + ... + 169588550.

It is an arithmetic number, because the mean of its divisors is an integer number (976800000).

Almost surely, 2^40531635009 is an apocalyptic number.

It is an amenable number.

40531635009 is a deficient number, since it is larger than the sum of its proper divisors (21983564991).

40531635009 is an frugal number, since it uses more digits than its factorization.

40531635009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The spelling of 40531635009 in words is "forty billion, five hundred thirty-one million, six hundred thirty-five thousand, nine".