656228061 has 48 divisors (see below), whose sum is σ = 1047009600. Its totient is φ = 409546368.

The previous prime is 656228051. The next prime is 656228077. The reversal of 656228061 is 160822656.

It is not a de Polignac number, because 656228061 - 2⁵ = 656228029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656228021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 410115 + ... + 411711.

It is an arithmetic number, because the mean of its divisors is an integer number (21812700).

Almost surely, 2^656228061 is an apocalyptic number.

It is an amenable number.

656228061 is a deficient number, since it is larger than the sum of its proper divisors (390781539).

656228061 is a wasteful number, since it uses less digits than its factorization.

656228061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720 (or 1708 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 656228061 is about 25616.9487058861. The cubic root of 656228061 is about 868.9969772345.

The spelling of 656228061 in words is "six hundred fifty-six million, two hundred twenty-eight thousand, sixty-one".