55122007776 has 96 divisors (see below), whose sum is σ = 166157308800. Its totient is φ = 15824494080.

The previous prime is 55122007747. The next prime is 55122007793. The reversal of 55122007776 is 67770022155.

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

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 15 ways as a sum of consecutive naturals, for example, 1353591 + ... + 1393718.

It is an arithmetic number, because the mean of its divisors is an integer number (1730805300).

Almost surely, 2^55122007776 is an apocalyptic number.

It is an amenable number.

55122007776 is an abundant number, since it is smaller than the sum of its proper divisors (111035301024).

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

55122007776 is a wasteful number, since it uses less digits than its factorization.

55122007776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747352 (or 2747344 counting only the distinct ones).

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

The spelling of 55122007776 in words is "fifty-five billion, one hundred twenty-two million, seven thousand, seven hundred seventy-six".