40544667673 has 4 divisors (see below), whose sum is σ = 41640469540. Its totient is φ = 39448865808.

The previous prime is 40544667659. The next prime is 40544667719. The reversal of 40544667673 is 37676644504.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14012167129 + 26532500544 = 118373^2 + 162888^2 .

It is a cyclic number.

It is not a de Polignac number, because 40544667673 - 2¹³ = 40544659481 is a prime.

It is a super-2 number, since 2×40544667673² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40544667673.

It is not an unprimeable number, because it can be changed into a prime (40544667643) 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, 547900878 + ... + 547900951.

It is an arithmetic number, because the mean of its divisors is an integer number (10410117385).

Almost surely, 2^40544667673 is an apocalyptic number.

It is an amenable number.

40544667673 is a deficient number, since it is larger than the sum of its proper divisors (1095801867).

40544667673 is a wasteful number, since it uses less digits than its factorization.

40544667673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095801866.

The product of its (nonzero) digits is 10160640, while the sum is 52.

The spelling of 40544667673 in words is "forty billion, five hundred forty-four million, six hundred sixty-seven thousand, six hundred seventy-three".