55578771826 has 4 divisors (see below), whose sum is σ = 83368157742. Its totient is φ = 27789385912.

The previous prime is 55578771799. The next prime is 55578771883. The reversal of 55578771826 is 62817787555.

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., 39224198601 + 16354573225 = 198051^2 + 127885^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13894692955 + ... + 13894692958.

Almost surely, 2^55578771826 is an apocalyptic number.

55578771826 is a deficient number, since it is larger than the sum of its proper divisors (27789385916).

55578771826 is a wasteful number, since it uses less digits than its factorization.

55578771826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27789385915.

The product of its digits is 32928000, while the sum is 61.

The spelling of 55578771826 in words is "fifty-five billion, five hundred seventy-eight million, seven hundred seventy-one thousand, eight hundred twenty-six".