51553200384 has 1008 divisors, whose sum is σ = 194455367680. Its totient is φ = 13302558720.

The previous prime is 51553200379. The next prime is 51553200407. The reversal of 51553200384 is 48300235515.

51553200384 is a `hidden beast` number, since 5 + 1 + 553 + 20 + 0 + 3 + 84 = 666.

It is a tau number, because it is divible by the number of its divisors (1008).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 769450719 + ... + 769450785.

Almost surely, 2^51553200384 is an apocalyptic number.

51553200384 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51553200384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97227683840).

51553200384 is an abundant number, since it is smaller than the sum of its proper divisors (142902167296).

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

51553200384 is an equidigital number, since it uses as much as digits as its factorization.

51553200384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Adding to 51553200384 its reverse (48300235515), we get a palindrome (99853435899).

The spelling of 51553200384 in words is "fifty-one billion, five hundred fifty-three million, two hundred thousand, three hundred eighty-four".