256516077 has 8 divisors (see below), whose sum is σ = 362140416. Its totient is φ = 160951232.

The previous prime is 256516061. The next prime is 256516097. The reversal of 256516077 is 770615652.

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 256516077 - 2⁴ = 256516061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256516037) 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, 2514813 + ... + 2514914.

It is an arithmetic number, because the mean of its divisors is an integer number (45267552).

Almost surely, 2^256516077 is an apocalyptic number.

It is an amenable number.

256516077 is a deficient number, since it is larger than the sum of its proper divisors (105624339).

256516077 is a wasteful number, since it uses less digits than its factorization.

256516077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5029747.

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 256516077 is about 16016.1192865188. The cubic root of 256516077 is about 635.3868120852.

The spelling of 256516077 in words is "two hundred fifty-six million, five hundred sixteen thousand, seventy-seven".