45402025545221 has 4 divisors (see below), whose sum is σ = 48072732930252. Its totient is φ = 42731318160192.

The previous prime is 45402025545161. The next prime is 45402025545277. The reversal of 45402025545221 is 12254552020454.

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 21283967037025 + 24118058508196 = 4613455^2 + 4911014^2 .

It is a cyclic number.

It is not a de Polignac number, because 45402025545221 - 2¹⁸ = 45402025283077 is a prime.

It is a super-2 number, since 2×45402025545221² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45402025545281) 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, 1335353692490 + ... + 1335353692523.

It is an arithmetic number, because the mean of its divisors is an integer number (12018183232563).

Almost surely, 2^{45402025545221} is an apocalyptic number.

It is an amenable number.

45402025545221 is a deficient number, since it is larger than the sum of its proper divisors (2670707385031).

45402025545221 is a wasteful number, since it uses less digits than its factorization.

45402025545221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670707385030.

The product of its (nonzero) digits is 640000, while the sum is 41.

Adding to 45402025545221 its reverse (12254552020454), we get a palindrome (57656577565675).

The spelling of 45402025545221 in words is "forty-five trillion, four hundred two billion, twenty-five million, five hundred forty-five thousand, two hundred twenty-one".