55326778 has 16 divisors (see below), whose sum is σ = 90891360. Its totient is φ = 25101936.

The previous prime is 55326769. The next prime is 55326797. The reversal of 55326778 is 87762355.

It is a super-2 number, since 2×55326778² = 6122104727722568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16500 + ... + 19567.

It is an arithmetic number, because the mean of its divisors is an integer number (5680710).

Almost surely, 2^55326778 is an apocalyptic number.

55326778 is a deficient number, since it is larger than the sum of its proper divisors (35564582).

55326778 is a wasteful number, since it uses less digits than its factorization.

55326778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36141.

The product of its digits is 352800, while the sum is 43.

The square root of 55326778 is about 7438.1972278234. The cubic root of 55326778 is about 381.0469237219.

The spelling of 55326778 in words is "fifty-five million, three hundred twenty-six thousand, seven hundred seventy-eight".