645124142541 has 48 divisors (see below), whose sum is σ = 992859023360. Its totient is φ = 371108770560.

The previous prime is 645124142527. The next prime is 645124142563. The reversal of 645124142541 is 145241421546.

645124142541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 645124142541 - 2¹⁰ = 645124141517 is a prime.

It is a super-3 number, since 3×645124142541³ (a number of 36 digits) contains 333 as substring.

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 645124142541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645124140541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120991 + ... + 1142316.

Almost surely, 2^645124142541 is an apocalyptic number.

It is an amenable number.

645124142541 is a deficient number, since it is larger than the sum of its proper divisors (347734880819).

645124142541 is a wasteful number, since it uses less digits than its factorization.

645124142541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263394 (or 1263377 counting only the distinct ones).

The product of its digits is 153600, while the sum is 39.

The spelling of 645124142541 in words is "six hundred forty-five billion, one hundred twenty-four million, one hundred forty-two thousand, five hundred forty-one".