45449548421 has 2 divisors, whose sum is σ = 45449548422. Its totient is φ = 45449548420.

The previous prime is 45449548393. The next prime is 45449548439. The reversal of 45449548421 is 12484594454.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43530232321 + 1919316100 = 208639^2 + 43810^2 .

It is a cyclic number.

It is not a de Polignac number, because 45449548421 - 2⁶ = 45449548357 is a prime.

It is a super-2 number, since 2×45449548421² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45449548421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45449548451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22724774210 + 22724774211.

It is an arithmetic number, because the mean of its divisors is an integer number (22724774211).

Almost surely, 2^45449548421 is an apocalyptic number.

It is an amenable number.

45449548421 is a deficient number, since it is larger than the sum of its proper divisors (1).

45449548421 is an equidigital number, since it uses as much as digits as its factorization.

45449548421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3686400, while the sum is 50.

The spelling of 45449548421 in words is "forty-five billion, four hundred forty-nine million, five hundred forty-eight thousand, four hundred twenty-one".