40643377212 has 12 divisors (see below), whose sum is σ = 94834546856. Its totient is φ = 13547792400.

The previous prime is 40643377207. The next prime is 40643377213. The reversal of 40643377212 is 21277334604.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×40643377212² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40643377213) 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 3 ways as a sum of consecutive naturals, for example, 1693474039 + ... + 1693474062.

Almost surely, 2^40643377212 is an apocalyptic number.

It is an amenable number.

40643377212 is an abundant number, since it is smaller than the sum of its proper divisors (54191169644).

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

40643377212 is a wasteful number, since it uses less digits than its factorization.

40643377212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386948108 (or 3386948106 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 39.

The spelling of 40643377212 in words is "forty billion, six hundred forty-three million, three hundred seventy-seven thousand, two hundred twelve".