54685978 has 4 divisors (see below), whose sum is σ = 82028970. Its totient is φ = 27342988.

The previous prime is 54685949. The next prime is 54686017. The reversal of 54685978 is 87958645.

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., 54066609 + 619369 = 7353^2 + 787^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13671493 + ... + 13671496.

Almost surely, 2^54685978 is an apocalyptic number.

54685978 is a deficient number, since it is larger than the sum of its proper divisors (27342992).

54685978 is a wasteful number, since it uses less digits than its factorization.

54685978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27342991.

The product of its digits is 2419200, while the sum is 52.

The square root of 54685978 is about 7394.9968221765. The cubic root of 54685978 is about 379.5701001654.

The spelling of 54685978 in words is "fifty-four million, six hundred eighty-five thousand, nine hundred seventy-eight".