256900061 has 6 divisors (see below), whose sum is σ = 282377886. Its totient is φ = 233545400.

The previous prime is 256900051. The next prime is 256900099. The reversal of 256900061 is 160009652.

It can be written as a sum of positive squares in only one way, i.e., 255808036 + 1092025 = 15994^2 + 1045^2 .

It is not a de Polignac number, because 256900061 - 2¹⁰ = 256899037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256899997 and 256900033.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256900001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1061450 + ... + 1061691.

It is an arithmetic number, because the mean of its divisors is an integer number (47062981).

Almost surely, 2^256900061 is an apocalyptic number.

It is an amenable number.

256900061 is a deficient number, since it is larger than the sum of its proper divisors (25477825).

256900061 is a wasteful number, since it uses less digits than its factorization.

256900061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2123163 (or 2123152 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 256900061 is about 16028.1022270261. The cubic root of 256900061 is about 635.7036950593.

The spelling of 256900061 in words is "two hundred fifty-six million, nine hundred thousand, sixty-one".