40245666645122 has 4 divisors (see below), whose sum is σ = 60368499967686. Its totient is φ = 20122833322560.

The previous prime is 40245666645091. The next prime is 40245666645127. The reversal of 40245666645122 is 22154666654204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 31321830821281 + 8923835823841 = 5596591^2 + 2987279^2 .

It is not an unprimeable number, because it can be changed into a prime (40245666645127) 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 as a sum of consecutive naturals, namely, 10061416661279 + ... + 10061416661282.

Almost surely, 2^{40245666645122} is an apocalyptic number.

40245666645122 is a deficient number, since it is larger than the sum of its proper divisors (20122833322564).

40245666645122 is a wasteful number, since it uses less digits than its factorization.

40245666645122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20122833322563.

The product of its (nonzero) digits is 16588800, while the sum is 53.

The spelling of 40245666645122 in words is "forty trillion, two hundred forty-five billion, six hundred sixty-six million, six hundred forty-five thousand, one hundred twenty-two".