56776619 has 2 divisors, whose sum is σ = 56776620. Its totient is φ = 56776618.

The previous prime is 56776613. The next prime is 56776633. The reversal of 56776619 is 91667765.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56776619 is a prime.

It is a super-2 number, since 2×56776619² = 6447168930142322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (56776613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28388309 + 28388310.

It is an arithmetic number, because the mean of its divisors is an integer number (28388310).

Almost surely, 2^56776619 is an apocalyptic number.

56776619 is a deficient number, since it is larger than the sum of its proper divisors (1).

56776619 is an equidigital number, since it uses as much as digits as its factorization.

56776619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 47.

The square root of 56776619 is about 7535.0261446129. The cubic root of 56776619 is about 384.3467169266.

The spelling of 56776619 in words is "fifty-six million, seven hundred seventy-six thousand, six hundred nineteen".