55664448 has 112 divisors (see below), whose sum is σ = 170688000. Its totient is φ = 15681024.

The previous prime is 55664431. The next prime is 55664449. The reversal of 55664448 is 84446655.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×55664448² = 6197061542289408, which contains 22 as substring.

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 (55664449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111303 + ... + 111801.

It is an arithmetic number, because the mean of its divisors is an integer number (1524000).

Almost surely, 2^55664448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55664448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85344000).

55664448 is an abundant number, since it is smaller than the sum of its proper divisors (115023552).

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

55664448 is a wasteful number, since it uses less digits than its factorization.

55664448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 594 counting only the distinct ones).

The product of its digits is 460800, while the sum is 42.

The square root of 55664448 is about 7460.8610763102. The cubic root of 55664448 is about 381.8205529434.

The spelling of 55664448 in words is "fifty-five million, six hundred sixty-four thousand, four hundred forty-eight".