77255863 has 4 divisors (see below), whose sum is σ = 77687640. Its totient is φ = 76824088.

The previous prime is 77255861. The next prime is 77255869. The reversal of 77255863 is 36855277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36855277 = 6029 ⋅6113.

It is a cyclic number.

It is not a de Polignac number, because 77255863 - 2¹ = 77255861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77255861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215620 + ... + 215977.

It is an arithmetic number, because the mean of its divisors is an integer number (19421910).

Almost surely, 2^77255863 is an apocalyptic number.

77255863 is a deficient number, since it is larger than the sum of its proper divisors (431777).

77255863 is a wasteful number, since it uses less digits than its factorization.

77255863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431776.

The product of its digits is 352800, while the sum is 43.

The square root of 77255863 is about 8789.5314437119. The cubic root of 77255863 is about 425.9027877397.

The spelling of 77255863 in words is "seventy-seven million, two hundred fifty-five thousand, eight hundred sixty-three".