64256311 has 16 divisors (see below), whose sum is σ = 77967360. Its totient is φ = 51696000.

The previous prime is 64256281. The next prime is 64256317. The reversal of 64256311 is 11365246.

It is a cyclic number.

It is not a de Polignac number, because 64256311 - 2⁹ = 64255799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64256311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64256317) 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, 85186 + ... + 85936.

It is an arithmetic number, because the mean of its divisors is an integer number (4872960).

Almost surely, 2^64256311 is an apocalyptic number.

64256311 is a deficient number, since it is larger than the sum of its proper divisors (13711049).

64256311 is a wasteful number, since it uses less digits than its factorization.

64256311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494.

The product of its digits is 4320, while the sum is 28.

The square root of 64256311 is about 8016.0034306380. The cubic root of 64256311 is about 400.5332699919.

It can be divided in two parts, 642 and 56311, that added together give a triangular number (56953 = T₃₃₇).

The spelling of 64256311 in words is "sixty-four million, two hundred fifty-six thousand, three hundred eleven".