657145543 has 4 divisors (see below), whose sum is σ = 660092608. Its totient is φ = 654198480.

The previous prime is 657145519. The next prime is 657145549. The reversal of 657145543 is 345541756.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-657145543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 657145496 and 657145505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (657145549) 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, 1473198 + ... + 1473643.

It is an arithmetic number, because the mean of its divisors is an integer number (165023152).

Almost surely, 2^657145543 is an apocalyptic number.

657145543 is a deficient number, since it is larger than the sum of its proper divisors (2947065).

657145543 is a wasteful number, since it uses less digits than its factorization.

657145543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947064.

The product of its digits is 252000, while the sum is 40.

The square root of 657145543 is about 25634.8501653511. The cubic root of 657145543 is about 869.4017744146.

The spelling of 657145543 in words is "six hundred fifty-seven million, one hundred forty-five thousand, five hundred forty-three".