55777874 has 4 divisors (see below), whose sum is σ = 83666814. Its totient is φ = 27888936.

The previous prime is 55777873. The next prime is 55777879. The reversal of 55777874 is 47877755.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 40513225 + 15264649 = 6365^2 + 3907^2 .

It is a super-2 number, since 2×55777874² = 6222342455919752, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55777873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13944467 + ... + 13944470.

Almost surely, 2^55777874 is an apocalyptic number.

55777874 is a deficient number, since it is larger than the sum of its proper divisors (27888940).

55777874 is a wasteful number, since it uses less digits than its factorization.

55777874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27888939.

The product of its digits is 1920800, while the sum is 50.

The square root of 55777874 is about 7468.4586093785. The cubic root of 55777874 is about 382.0797189325.

The spelling of 55777874 in words is "fifty-five million, seven hundred seventy-seven thousand, eight hundred seventy-four".