40401326636 has 12 divisors (see below), whose sum is σ = 77129805480. Its totient is φ = 18364239360.

The previous prime is 40401326621. The next prime is 40401326671. The reversal of 40401326636 is 63662310404.

It is a junction number, because it is equal to n+sod(n) for n = 40401326596 and 40401326605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 459105941 + ... + 459106028.

It is an arithmetic number, because the mean of its divisors is an integer number (6427483790).

Almost surely, 2^40401326636 is an apocalyptic number.

It is an amenable number.

40401326636 is a deficient number, since it is larger than the sum of its proper divisors (36728478844).

40401326636 is a wasteful number, since it uses less digits than its factorization.

40401326636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918211984 (or 918211982 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 35.

The spelling of 40401326636 in words is "forty billion, four hundred one million, three hundred twenty-six thousand, six hundred thirty-six".