45405481898221 has 4 divisors (see below), whose sum is σ = 45677371011552. Its totient is φ = 45133592784892.

The previous prime is 45405481898177. The next prime is 45405481898233. The reversal of 45405481898221 is 12289818450454.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45405481898221 - 2²¹ = 45405479801069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45405481898221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45405481898281) 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, 135944556415 + ... + 135944556748.

It is an arithmetic number, because the mean of its divisors is an integer number (11419342752888).

Almost surely, 2^{45405481898221} is an apocalyptic number.

It is an amenable number.

45405481898221 is a deficient number, since it is larger than the sum of its proper divisors (271889113331).

45405481898221 is a wasteful number, since it uses less digits than its factorization.

45405481898221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271889113330.

The product of its (nonzero) digits is 29491200, while the sum is 61.

The spelling of 45405481898221 in words is "forty-five trillion, four hundred five billion, four hundred eighty-one million, eight hundred ninety-eight thousand, two hundred twenty-one".