55287161500000 has 168 divisors, whose sum is σ = 136185809611824. Its totient is φ = 22093848000000.

The previous prime is 55287161499917. The next prime is 55287161500007. The reversal of 55287161500000 is 516178255.

It is a happy number.

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 (55287161500007) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 531447990 + ... + 531552010.

It is an arithmetic number, because the mean of its divisors is an integer number (810629819118).

Almost surely, 2^{55287161500000} is an apocalyptic number.

55287161500000 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 55287161500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68092904805912).

55287161500000 is an abundant number, since it is smaller than the sum of its proper divisors (80898648111824).

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

55287161500000 is an equidigital number, since it uses as much as digits as its factorization.

55287161500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105124 (or 105091 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 40.

Adding to 55287161500000 its reverse (516178255), we get a palindrome (55287677678255).

The spelling of 55287161500000 in words is "fifty-five trillion, two hundred eighty-seven billion, one hundred sixty-one million, five hundred thousand".