40203666612 has 18 divisors (see below), whose sum is σ = 101625935138. Its totient is φ = 13401222192.

The previous prime is 40203666611. The next prime is 40203666619. The reversal of 40203666612 is 21666630204.

It can be written as a sum of positive squares in only one way, i.e., 39694983696 + 508682916 = 199236^2 + 22554^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1116768517 = 40203666612 / (4 + 0 + 2 + 0 + 3 + 6 + 6 + 6 + 6 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40203666611) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 558384223 + ... + 558384294.

Almost surely, 2^40203666612 is an apocalyptic number.

It is an amenable number.

40203666612 is an abundant number, since it is smaller than the sum of its proper divisors (61422268526).

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

40203666612 is a wasteful number, since it uses less digits than its factorization.

40203666612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116768527 (or 1116768522 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 40203666612 in words is "forty billion, two hundred three million, six hundred sixty-six thousand, six hundred twelve".