54721778 has 4 divisors (see below), whose sum is σ = 82082670. Its totient is φ = 27360888.

The previous prime is 54721741. The next prime is 54721783. The reversal of 54721778 is 87712745.

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., 51739249 + 2982529 = 7193^2 + 1727^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13680443 + ... + 13680446.

Almost surely, 2^54721778 is an apocalyptic number.

54721778 is a deficient number, since it is larger than the sum of its proper divisors (27360892).

54721778 is a wasteful number, since it uses less digits than its factorization.

54721778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27360891.

The product of its digits is 109760, while the sum is 41.

The square root of 54721778 is about 7397.4169816227. The cubic root of 54721778 is about 379.6529102135.

The spelling of 54721778 in words is "fifty-four million, seven hundred twenty-one thousand, seven hundred seventy-eight".