657342545 has 16 divisors (see below), whose sum is σ = 809515728. Its totient is φ = 512117760.

The previous prime is 657342529. The next prime is 657342551. The reversal of 657342545 is 545243756.

It can be written as a sum of positive squares in 8 ways, for example, as 260854801 + 396487744 = 16151^2 + 19912^2 .

It is not a de Polignac number, because 657342545 - 2⁴ = 657342529 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a Curzon number.

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, 123887 + ... + 129083.

It is an arithmetic number, because the mean of its divisors is an integer number (50594733).

Almost surely, 2^657342545 is an apocalyptic number.

It is an amenable number.

657342545 is a deficient number, since it is larger than the sum of its proper divisors (152173183).

657342545 is a wasteful number, since it uses less digits than its factorization.

657342545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5860.

The product of its digits is 504000, while the sum is 41.

The square root of 657342545 is about 25638.6923418493. The cubic root of 657342545 is about 869.4886434388.

The spelling of 657342545 in words is "six hundred fifty-seven million, three hundred forty-two thousand, five hundred forty-five".