40631385541 has 4 divisors (see below), whose sum is σ = 40631792032. Its totient is φ = 40630979052.

The previous prime is 40631385503. The next prime is 40631385559. The reversal of 40631385541 is 14558313604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40631385541 - 2⁷ = 40631385413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40631385494 and 40631385503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40631385581) 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, 62590 + ... + 291856.

It is an arithmetic number, because the mean of its divisors is an integer number (10157948008).

Almost surely, 2^40631385541 is an apocalyptic number.

It is an amenable number.

40631385541 is a deficient number, since it is larger than the sum of its proper divisors (406491).

40631385541 is a wasteful number, since it uses less digits than its factorization.

40631385541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406490.

The product of its (nonzero) digits is 172800, while the sum is 40.

The spelling of 40631385541 in words is "forty billion, six hundred thirty-one million, three hundred eighty-five thousand, five hundred forty-one".