40003456636 has 72 divisors (see below), whose sum is σ = 87561555984. Its totient is φ = 15797283840.

The previous prime is 40003456621. The next prime is 40003456637. The reversal of 40003456636 is 63665430004.

It is a junction number, because it is equal to n+sod(n) for n = 40003456595 and 40003456604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40003456637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31815 + ... + 284638.

It is an arithmetic number, because the mean of its divisors is an integer number (1216132722).

Almost surely, 2^40003456636 is an apocalyptic number.

It is an amenable number.

40003456636 is an abundant number, since it is smaller than the sum of its proper divisors (47558099348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40003456636 is a wasteful number, since it uses less digits than its factorization.

40003456636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316511 (or 316496 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 40003456636 in words is "forty billion, three million, four hundred fifty-six thousand, six hundred thirty-six".