13445542450321 has 4 divisors (see below), whose sum is σ = 13469681665332. Its totient is φ = 13421403235312.

The previous prime is 13445542450309. The next prime is 13445542450337. The reversal of 13445542450321 is 12305424554431.

It is a happy number.

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 1354372250625 + 12091170199696 = 1163775^2 + 3477236^2 .

It is a cyclic number.

It is not a de Polignac number, because 13445542450321 - 2¹⁵ = 13445542417553 is a prime.

It is a super-2 number, since 2×13445542450321² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13445542450121) 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, 12069606670 + ... + 12069607783.

It is an arithmetic number, because the mean of its divisors is an integer number (3367420416333).

Almost surely, 2^{13445542450321} is an apocalyptic number.

It is an amenable number.

13445542450321 is a deficient number, since it is larger than the sum of its proper divisors (24139215011).

13445542450321 is an equidigital number, since it uses as much as digits as its factorization.

13445542450321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24139215010.

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 13445542450321 in words is "thirteen trillion, four hundred forty-five billion, five hundred forty-two million, four hundred fifty thousand, three hundred twenty-one".