256640102523061 has 16 divisors (see below), whose sum is σ = 258909587200000. Its totient is φ = 254374569566208.

The previous prime is 256640102523043. The next prime is 256640102523071. The reversal of 256640102523061 is 160325201046652.

256640102523061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 256640102523061 - 2¹³ = 256640102514869 is a prime.

It is a super-2 number, since 2×256640102523061² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256640102522999 and 256640102523017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256640102523031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1011729301 + ... + 1011982933.

It is an arithmetic number, because the mean of its divisors is an integer number (16181849200000).

Almost surely, 2^{256640102523061} is an apocalyptic number.

It is an amenable number.

256640102523061 is a deficient number, since it is larger than the sum of its proper divisors (2269484676939).

256640102523061 is a wasteful number, since it uses less digits than its factorization.

256640102523061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261388.

The product of its (nonzero) digits is 518400, while the sum is 43.

The spelling of 256640102523061 in words is "two hundred fifty-six trillion, six hundred forty billion, one hundred two million, five hundred twenty-three thousand, sixty-one".