55776259 has 16 divisors (see below), whose sum is σ = 70963200. Its totient is φ = 43459080.

The previous prime is 55776247. The next prime is 55776271. The reversal of 55776259 is 95267755.

It is an interprime number because it is at equal distance from previous prime (55776247) and next prime (55776271).

It is not a de Polignac number, because 55776259 - 2⁹ = 55775747 is a prime.

It is a super-2 number, since 2×55776259² = 6221982136070162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (55770259) 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, 3619 + ... + 11164.

It is an arithmetic number, because the mean of its divisors is an integer number (4435200).

Almost surely, 2^55776259 is an apocalyptic number.

55776259 is a deficient number, since it is larger than the sum of its proper divisors (15186941).

55776259 is a wasteful number, since it uses less digits than its factorization.

55776259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14815 (or 14801 counting only the distinct ones).

The product of its digits is 661500, while the sum is 46.

The square root of 55776259 is about 7468.3504872227. The cubic root of 55776259 is about 382.0760313013.

The spelling of 55776259 in words is "fifty-five million, seven hundred seventy-six thousand, two hundred fifty-nine".