55400071776 has 96 divisors (see below), whose sum is σ = 166406784768. Its totient is φ = 15808919040.

The previous prime is 55400071747. The next prime is 55400071777. The reversal of 55400071776 is 67717000455.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55400071777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494166 + ... + 595818.

It is an arithmetic number, because the mean of its divisors is an integer number (1733404008).

Almost surely, 2^55400071776 is an apocalyptic number.

55400071776 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 55400071776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83203392384).

55400071776 is an abundant number, since it is smaller than the sum of its proper divisors (111006712992).

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

55400071776 is a wasteful number, since it uses less digits than its factorization.

55400071776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102484 (or 102476 counting only the distinct ones).

The product of its (nonzero) digits is 205800, while the sum is 42.

The spelling of 55400071776 in words is "fifty-five billion, four hundred million, seventy-one thousand, seven hundred seventy-six".