40064670561 has 8 divisors (see below), whose sum is σ = 53498938720. Its totient is φ = 26670091392.

The previous prime is 40064670533. The next prime is 40064670601. The reversal of 40064670561 is 16507646004.

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

It is not a de Polignac number, because 40064670561 - 2¹⁰ = 40064669537 is a prime.

It is a super-2 number, since 2×40064670561² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40064675561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9919891 + ... + 9923928.

It is an arithmetic number, because the mean of its divisors is an integer number (6687367340).

Almost surely, 2^40064670561 is an apocalyptic number.

It is an amenable number.

40064670561 is a deficient number, since it is larger than the sum of its proper divisors (13434268159).

40064670561 is a wasteful number, since it uses less digits than its factorization.

40064670561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19844495.

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 40064670561 in words is "forty billion, sixty-four million, six hundred seventy thousand, five hundred sixty-one".