53919618 has 16 divisors (see below), whose sum is σ = 108210816. Its totient is φ = 17911280.

The previous prime is 53919617. The next prime is 53919623. The reversal of 53919618 is 81691935.

It is a self number, because there is not a number n which added to its sum of digits gives 53919618.

It is not an unprimeable number, because it can be changed into a prime (53919611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13578 + ... + 17093.

It is an arithmetic number, because the mean of its divisors is an integer number (6763176).

Almost surely, 2^53919618 is an apocalyptic number.

53919618 is an abundant number, since it is smaller than the sum of its proper divisors (54291198).

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

53919618 is a wasteful number, since it uses less digits than its factorization.

53919618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30969.

The product of its digits is 58320, while the sum is 42.

The square root of 53919618 is about 7342.9978891458. The cubic root of 53919618 is about 377.7886755859.

The spelling of 53919618 in words is "fifty-three million, nine hundred nineteen thousand, six hundred eighteen".