55776747 has 16 divisors (see below), whose sum is σ = 81059328. Its totient is φ = 33908640.

The previous prime is 55776739. The next prime is 55776751. The reversal of 55776747 is 74767755.

It is not a de Polignac number, because 55776747 - 2³ = 55776739 is a prime.

It is a super-2 number, since 2×55776747² = 6222091011804018, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55776696 and 55776705.

It is not an unprimeable number, because it can be changed into a prime (55776737) 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, 5379 + ... + 11852.

It is an arithmetic number, because the mean of its divisors is an integer number (5066208).

Almost surely, 2^55776747 is an apocalyptic number.

55776747 is a deficient number, since it is larger than the sum of its proper divisors (25282581).

55776747 is a wasteful number, since it uses less digits than its factorization.

55776747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17330.

The product of its digits is 1440600, while the sum is 48.

The square root of 55776747 is about 7468.3831583550. The cubic root of 55776747 is about 382.0771455899.

The spelling of 55776747 in words is "fifty-five million, seven hundred seventy-six thousand, seven hundred forty-seven".