40685817503 has 4 divisors (see below), whose sum is σ = 40688306808. Its totient is φ = 40683328200.

The previous prime is 40685817499. The next prime is 40685817517. The reversal of 40685817503 is 30571858604.

40685817503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40685817503 - 2² = 40685817499 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40685817563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1219973 + ... + 1252878.

It is an arithmetic number, because the mean of its divisors is an integer number (10172076702).

Almost surely, 2^40685817503 is an apocalyptic number.

40685817503 is a deficient number, since it is larger than the sum of its proper divisors (2489305).

40685817503 is a wasteful number, since it uses less digits than its factorization.

40685817503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489304.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 40685817503 in words is "forty billion, six hundred eighty-five million, eight hundred seventeen thousand, five hundred three".