76561255 has 4 divisors (see below), whose sum is σ = 91873512. Its totient is φ = 61249000.

The previous prime is 76561249. The next prime is 76561297. The reversal of 76561255 is 55216567.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55216567 = 7 ⋅7888081.

It is not a de Polignac number, because 76561255 - 2¹³ = 76553063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7656121 + ... + 7656130.

It is an arithmetic number, because the mean of its divisors is an integer number (22968378).

Almost surely, 2^76561255 is an apocalyptic number.

76561255 is a deficient number, since it is larger than the sum of its proper divisors (15312257).

76561255 is a wasteful number, since it uses less digits than its factorization.

76561255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15312256.

The product of its digits is 63000, while the sum is 37.

The square root of 76561255 is about 8749.9288568536. The cubic root of 76561255 is about 424.6225114082.

It can be divided in two parts, 7656 and 1255, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 76561255 in words is "seventy-six million, five hundred sixty-one thousand, two hundred fifty-five".