4545444012545 has 16 divisors (see below), whose sum is σ = 5580342713088. Its totient is φ = 3552752945280.

The previous prime is 4545444012521. The next prime is 4545444012563. The reversal of 4545444012545 is 5452104445454.

It is not a de Polignac number, because 4545444012545 - 2²⁶ = 4545376903681 is a prime.

It is a super-2 number, since 2×4545444012545² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

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 4545444012545.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16803044 + ... + 17071413.

It is an arithmetic number, because the mean of its divisors is an integer number (348771419568).

Almost surely, 2^{4545444012545} is an apocalyptic number.

It is an amenable number.

4545444012545 is a deficient number, since it is larger than the sum of its proper divisors (1034898700543).

4545444012545 is a wasteful number, since it uses less digits than its factorization.

4545444012545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33875080.

The product of its (nonzero) digits is 5120000, while the sum is 47.

Adding to 4545444012545 its reverse (5452104445454), we get a palindrome (9997548457999).

The spelling of 4545444012545 in words is "four trillion, five hundred forty-five billion, four hundred forty-four million, twelve thousand, five hundred forty-five".