55987200000 has 672 divisors, whose sum is σ = 209893753440. Its totient is φ = 14929920000.

The previous prime is 55987199977. The next prime is 55987200037. The reversal of 55987200000 is 278955.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

55987200000 is a `hidden beast` number, since 559 + 87 + 20 + 0 + 0 + 0 + 0 = 666.

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 47 ways as a sum of consecutive naturals, for example, 11197439998 + ... + 11197440002.

It is an arithmetic number, because the mean of its divisors is an integer number (312341895).

Almost surely, 2^55987200000 is an apocalyptic number.

55987200000 is a gapful number since it is divisible by the number (50) 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 55987200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104946876720).

55987200000 is an abundant number, since it is smaller than the sum of its proper divisors (153906553440).

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

55987200000 is an frugal number, since it uses more digits than its factorization.

55987200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 10 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

Adding to 55987200000 its reverse (278955), we get a palindrome (55987478955).

The spelling of 55987200000 in words is "fifty-five billion, nine hundred eighty-seven million, two hundred thousand".