55443215016 has 240 divisors, whose sum is σ = 182345644800. Its totient is φ = 15691910976.

The previous prime is 55443214991. The next prime is 55443215039. The reversal of 55443215016 is 61051234455.

55443215016 is a `hidden beast` number, since 55 + 443 + 2 + 150 + 16 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 3389305 + ... + 3405623.

It is an arithmetic number, because the mean of its divisors is an integer number (759773520).

Almost surely, 2^55443215016 is an apocalyptic number.

55443215016 is a gapful number since it is divisible by the number (56) 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 55443215016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91172822400).

55443215016 is an abundant number, since it is smaller than the sum of its proper divisors (126902429784).

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

55443215016 is a wasteful number, since it uses less digits than its factorization.

55443215016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16458 (or 16438 counting only the distinct ones).

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

The spelling of 55443215016 in words is "fifty-five billion, four hundred forty-three million, two hundred fifteen thousand, sixteen".