55477216066776 has 64 divisors (see below), whose sum is σ = 158515471027200. Its totient is φ = 15849719221248.

The previous prime is 55477216066739. The next prime is 55477216066871. The reversal of 55477216066776 is 67766061277455.

It is a self number, because there is not a number n which added to its sum of digits gives 55477216066776.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6595225 + ... + 12427848.

It is an arithmetic number, because the mean of its divisors is an integer number (2476804234800).

Almost surely, 2^{55477216066776} is an apocalyptic number.

55477216066776 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55477216066776 is an abundant number, since it is smaller than the sum of its proper divisors (103038254960424).

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

55477216066776 is a wasteful number, since it uses less digits than its factorization.

55477216066776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19040448 (or 19040444 counting only the distinct ones).

The product of its (nonzero) digits is 622339200, while the sum is 69.

The spelling of 55477216066776 in words is "fifty-five trillion, four hundred seventy-seven billion, two hundred sixteen million, sixty-six thousand, seven hundred seventy-six".