657472145 has 16 divisors (see below), whose sum is σ = 862989120. Its totient is φ = 476884800.

The previous prime is 657472099. The next prime is 657472159. The reversal of 657472145 is 541274756.

It is not a de Polignac number, because 657472145 - 2²⁰ = 656423569 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5075 + ... + 36615.

It is an arithmetic number, because the mean of its divisors is an integer number (53936820).

Almost surely, 2^657472145 is an apocalyptic number.

It is an amenable number.

657472145 is a deficient number, since it is larger than the sum of its proper divisors (205516975).

657472145 is a wasteful number, since it uses less digits than its factorization.

657472145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31936.

The product of its digits is 235200, while the sum is 41.

The square root of 657472145 is about 25641.2196472789. The cubic root of 657472145 is about 869.5457817473.

The spelling of 657472145 in words is "six hundred fifty-seven million, four hundred seventy-two thousand, one hundred forty-five".