657256255 has 4 divisors (see below), whose sum is σ = 788707512. Its totient is φ = 525805000.

The previous prime is 657256241. The next prime is 657256277. The reversal of 657256255 is 552652756.

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

It is not a de Polignac number, because 657256255 - 2¹¹ = 657254207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65725621 + ... + 65725630.

It is an arithmetic number, because the mean of its divisors is an integer number (197176878).

Almost surely, 2^657256255 is an apocalyptic number.

657256255 is a deficient number, since it is larger than the sum of its proper divisors (131451257).

657256255 is a wasteful number, since it uses less digits than its factorization.

657256255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131451256.

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

The square root of 657256255 is about 25637.0094784864. The cubic root of 657256255 is about 869.4505955651.

The spelling of 657256255 in words is "six hundred fifty-seven million, two hundred fifty-six thousand, two hundred fifty-five".