55451998080 has 384 divisors, whose sum is σ = 204094313280. Its totient is φ = 13824884736.

The previous prime is 55451998079. The next prime is 55451998081. The reversal of 55451998080 is 8089915455.

55451998080 is a `hidden beast` number, since 5 + 545 + 1 + 9 + 98 + 0 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (55451998079) and next prime (55451998081).

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55451998081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15371637 + ... + 15375243.

Almost surely, 2^55451998080 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 55451998080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102047156640).

55451998080 is an abundant number, since it is smaller than the sum of its proper divisors (148642315200).

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

55451998080 is a wasteful number, since it uses less digits than its factorization.

55451998080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806 (or 3791 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 54.

The spelling of 55451998080 in words is "fifty-five billion, four hundred fifty-one million, nine hundred ninety-eight thousand, eighty".