657145545 has 32 divisors (see below), whose sum is σ = 1206670080. Its totient is φ = 299151360.

The previous prime is 657145519. The next prime is 657145549. The reversal of 657145545 is 545541756.

It is not a de Polignac number, because 657145545 - 2⁹ = 657145033 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 657145497 and 657145506.

It is not an unprimeable number, because it can be changed into a prime (657145549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12321 + ... + 38289.

It is an arithmetic number, because the mean of its divisors is an integer number (37708440).

Almost surely, 2^657145545 is an apocalyptic number.

It is an amenable number.

657145545 is a deficient number, since it is larger than the sum of its proper divisors (549524535).

657145545 is a wasteful number, since it uses less digits than its factorization.

657145545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26225.

The product of its digits is 420000, while the sum is 42.

The square root of 657145545 is about 25634.8502043605. The cubic root of 657145545 is about 869.4017752966.

The spelling of 657145545 in words is "six hundred fifty-seven million, one hundred forty-five thousand, five hundred forty-five".