40644646026 has 8 divisors (see below), whose sum is σ = 81289292064. Its totient is φ = 13548215340.

The previous prime is 40644646001. The next prime is 40644646057. The reversal of 40644646026 is 62064644604.

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

40644646026 is an admirable number.

It is a super-3 number, since 3×40644646026³ (a number of 33 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3387053830 + ... + 3387053841.

It is an arithmetic number, because the mean of its divisors is an integer number (10161161508).

Almost surely, 2^40644646026 is an apocalyptic number.

40644646026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40644646026 is a wasteful number, since it uses less digits than its factorization.

40644646026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6774107676.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 40644646026 in words is "forty billion, six hundred forty-four million, six hundred forty-six thousand, twenty-six".