40644794953 has 4 divisors (see below), whose sum is σ = 46451194240. Its totient is φ = 34838395668.

The previous prime is 40644794933. The next prime is 40644795007. The reversal of 40644794953 is 35949744604.

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.

It is a cyclic number.

It is not a de Polignac number, because 40644794953 - 2³³ = 32054860361 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40644794894 and 40644794903.

It is not an unprimeable number, because it can be changed into a prime (40644794923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2903199633 + ... + 2903199646.

It is an arithmetic number, because the mean of its divisors is an integer number (11612798560).

Almost surely, 2^40644794953 is an apocalyptic number.

It is an amenable number.

40644794953 is a deficient number, since it is larger than the sum of its proper divisors (5806399287).

40644794953 is an equidigital number, since it uses as much as digits as its factorization.

40644794953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5806399286.

The product of its (nonzero) digits is 13063680, while the sum is 55.

The spelling of 40644794953 in words is "forty billion, six hundred forty-four million, seven hundred ninety-four thousand, nine hundred fifty-three".