55439354880 has 1320 divisors, whose sum is σ = 248027817312. Its totient is φ = 11593580544.

The previous prime is 55439354851. The next prime is 55439354881. The reversal of 55439354880 is 8845393455.

55439354880 is a `hidden beast` number, since 5 + 5 + 4 + 3 + 93 + 548 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (55439354881) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 490613704 + ... + 490613816.

Almost surely, 2^55439354880 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 55439354880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124013908656).

55439354880 is an abundant number, since it is smaller than the sum of its proper divisors (192588462432).

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

55439354880 is a wasteful number, since it uses less digits than its factorization.

55439354880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 10368000, while the sum is 54.

The spelling of 55439354880 in words is "fifty-five billion, four hundred thirty-nine million, three hundred fifty-four thousand, eight hundred eighty".