55404667120 has 80 divisors (see below), whose sum is σ = 141311848320. Its totient is φ = 20034540800.

The previous prime is 55404667117. The next prime is 55404667121. The reversal of 55404667120 is 2176640455.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55404667121) 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, 18346 + ... + 333385.

It is an arithmetic number, because the mean of its divisors is an integer number (1766398104).

Almost surely, 2^55404667120 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 55404667120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70655924160).

55404667120 is an abundant number, since it is smaller than the sum of its proper divisors (85907181200).

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

55404667120 is a wasteful number, since it uses less digits than its factorization.

55404667120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351934 (or 351928 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 55404667120 in words is "fifty-five billion, four hundred four million, six hundred sixty-seven thousand, one hundred twenty".