450123361443661 has 4 divisors (see below), whose sum is σ = 450705668509692. Its totient is φ = 449541054377632.

The previous prime is 450123361443649. The next prime is 450123361443673. The reversal of 450123361443661 is 166344163321054.

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

It is an interprime number because it is at equal distance from previous prime (450123361443649) and next prime (450123361443673).

It can be written as a sum of positive squares in 2 ways, for example, as 113442331166761 + 336681030276900 = 10650931^2 + 18348870^2 .

It is a cyclic number.

It is not a de Polignac number, because 450123361443661 - 2⁹ = 450123361443149 is a prime.

It is a super-2 number, since 2×450123361443661² (a number of 30 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 (450123361443641) 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, 291153531856 + ... + 291153533401.

It is an arithmetic number, because the mean of its divisors is an integer number (112676417127423).

Almost surely, 2^{450123361443661} is an apocalyptic number.

It is an amenable number.

450123361443661 is a deficient number, since it is larger than the sum of its proper divisors (582307066031).

450123361443661 is an equidigital number, since it uses as much as digits as its factorization.

450123361443661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582307066030.

The product of its (nonzero) digits is 3732480, while the sum is 49.

The spelling of 450123361443661 in words is "four hundred fifty trillion, one hundred twenty-three billion, three hundred sixty-one million, four hundred forty-three thousand, six hundred sixty-one".