40042664645 has 8 divisors (see below), whose sum is σ = 48338930304. Its totient is φ = 31842309904.

The previous prime is 40042664639. The next prime is 40042664647. The reversal of 40042664645 is 54646624004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40042664645 - 2¹² = 40042660549 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 (40042664647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23976809 + ... + 23978478.

It is an arithmetic number, because the mean of its divisors is an integer number (6042366288).

Almost surely, 2^40042664645 is an apocalyptic number.

It is an amenable number.

40042664645 is a deficient number, since it is larger than the sum of its proper divisors (8296265659).

40042664645 is a wasteful number, since it uses less digits than its factorization.

40042664645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47955459.

The product of its (nonzero) digits is 552960, while the sum is 41.

The spelling of 40042664645 in words is "forty billion, forty-two million, six hundred sixty-four thousand, six hundred forty-five".