55073664 has 48 divisors (see below), whose sum is σ = 158483520. Its totient is φ = 18357504.

The previous prime is 55073663. The next prime is 55073671. The reversal of 55073664 is 46637055.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55073663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22752 + ... + 25055.

It is an arithmetic number, because the mean of its divisors is an integer number (3301740).

Almost surely, 2^55073664 is an apocalyptic number.

It is an amenable number.

55073664 is an abundant number, since it is smaller than the sum of its proper divisors (103409856).

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

55073664 is a wasteful number, since it uses less digits than its factorization.

55073664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47827 (or 47812 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 55073664 is about 7421.1632511352. The cubic root of 55073664 is about 380.4649525699.

The spelling of 55073664 in words is "fifty-five million, seventy-three thousand, six hundred sixty-four".