55399329216 has 1120 divisors, whose sum is σ = 218853617664. Its totient is φ = 13548902400.

The previous prime is 55399329143. The next prime is 55399329221. The reversal of 55399329216 is 61292399355.

It is a happy number.

55399329216 is a `hidden beast` number, since 5 + 5 + 399 + 32 + 9 + 216 = 666.

It is a super-3 number, since 3×55399329216³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1497279150 + ... + 1497279186.

Almost surely, 2^55399329216 is an apocalyptic number.

55399329216 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 55399329216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109426808832).

55399329216 is an abundant number, since it is smaller than the sum of its proper divisors (163454288448).

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

55399329216 is a wasteful number, since it uses less digits than its factorization.

55399329216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 91 counting only the distinct ones).

The product of its digits is 3936600, while the sum is 54.

The spelling of 55399329216 in words is "fifty-five billion, three hundred ninety-nine million, three hundred twenty-nine thousand, two hundred sixteen".