40123220507245 has 4 divisors (see below), whose sum is σ = 48147864608700. Its totient is φ = 32098576405792.

The previous prime is 40123220507203. The next prime is 40123220507339. The reversal of 40123220507245 is 54270502232104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5094021916036 + 35029198591209 = 2256994^2 + 5918547^2 .

It is a cyclic number.

It is not a de Polignac number, because 40123220507245 - 2¹³ = 40123220499053 is a prime.

It is a congruent 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, 4012322050720 + ... + 4012322050729.

It is an arithmetic number, because the mean of its divisors is an integer number (12036966152175).

Almost surely, 2^{40123220507245} is an apocalyptic number.

It is an amenable number.

40123220507245 is a deficient number, since it is larger than the sum of its proper divisors (8024644101455).

40123220507245 is an equidigital number, since it uses as much as digits as its factorization.

40123220507245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8024644101454.

The product of its (nonzero) digits is 134400, while the sum is 37.

Adding to 40123220507245 its reverse (54270502232104), we get a palindrome (94393722739349).

The spelling of 40123220507245 in words is "forty trillion, one hundred twenty-three billion, two hundred twenty million, five hundred seven thousand, two hundred forty-five".