256755722061 has 8 divisors (see below), whose sum is σ = 342414146880. Its totient is φ = 171133889312.

The previous prime is 256755722059. The next prime is 256755722101. The reversal of 256755722061 is 160227557652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256755722061 - 2¹ = 256755722059 is a prime.

It is a super-2 number, since 2×256755722061² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256755722061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256755722011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9131640 + ... + 9159713.

It is an arithmetic number, because the mean of its divisors is an integer number (42801768360).

Almost surely, 2^256755722061 is an apocalyptic number.

It is an amenable number.

256755722061 is a deficient number, since it is larger than the sum of its proper divisors (85658424819).

256755722061 is a wasteful number, since it uses less digits than its factorization.

256755722061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18296035.

The product of its (nonzero) digits is 1764000, while the sum is 48.

The spelling of 256755722061 in words is "two hundred fifty-six billion, seven hundred fifty-five million, seven hundred twenty-two thousand, sixty-one".