657556045 has 16 divisors (see below), whose sum is σ = 812769840. Its totient is φ = 510326784.

The previous prime is 657556037. The next prime is 657556051. The reversal of 657556045 is 540655756.

It can be written as a sum of positive squares in 8 ways, for example, as 249001 + 657307044 = 499^2 + 25638^2 .

It is a cyclic number.

It is not a de Polignac number, because 657556045 - 2³ = 657556037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 657555992 and 657556010.

It is a congruent 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, 60271 + ... + 70339.

It is an arithmetic number, because the mean of its divisors is an integer number (50798115).

Almost surely, 2^657556045 is an apocalyptic number.

It is an amenable number.

657556045 is a deficient number, since it is larger than the sum of its proper divisors (155213795).

657556045 is a wasteful number, since it uses less digits than its factorization.

657556045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10464.

The product of its (nonzero) digits is 630000, while the sum is 43.

The square root of 657556045 is about 25642.8556327099. The cubic root of 657556045 is about 869.5827677442.

The spelling of 657556045 in words is "six hundred fifty-seven million, five hundred fifty-six thousand, forty-five".