54778164 has 24 divisors (see below), whose sum is σ = 146075328. Its totient is φ = 15650880.

The previous prime is 54778153. The next prime is 54778169. The reversal of 54778164 is 46187745.

54778164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54778169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325977 + ... + 326144.

It is an arithmetic number, because the mean of its divisors is an integer number (6086472).

Almost surely, 2^54778164 is an apocalyptic number.

It is an amenable number.

54778164 is an abundant number, since it is smaller than the sum of its proper divisors (91297164).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

54778164 is a wasteful number, since it uses less digits than its factorization.

54778164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652135 (or 652133 counting only the distinct ones).

The product of its digits is 188160, while the sum is 42.

The square root of 54778164 is about 7401.2271955399. The cubic root of 54778164 is about 379.7832651427.

The spelling of 54778164 in words is "fifty-four million, seven hundred seventy-eight thousand, one hundred sixty-four".