45142405324021 has 4 divisors (see below), whose sum is σ = 45147799334700. Its totient is φ = 45137011313344.

The previous prime is 45142405324013. The next prime is 45142405324099. The reversal of 45142405324021 is 12042350424154.

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 39365761317796 + 5776644006225 = 6274214^2 + 2403465^2 .

It is a cyclic number.

It is not a de Polignac number, because 45142405324021 - 2³ = 45142405324013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45142405304021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2696992786 + ... + 2697009523.

It is an arithmetic number, because the mean of its divisors is an integer number (11286949833675).

Almost surely, 2^{45142405324021} is an apocalyptic number.

It is an amenable number.

45142405324021 is a deficient number, since it is larger than the sum of its proper divisors (5394010679).

45142405324021 is an equidigital number, since it uses as much as digits as its factorization.

45142405324021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5394010678.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 45142405324021 its reverse (12042350424154), we get a palindrome (57184755748175).

The spelling of 45142405324021 in words is "forty-five trillion, one hundred forty-two billion, four hundred five million, three hundred twenty-four thousand, twenty-one".