55909244772 has 36 divisors (see below), whose sum is σ = 141352310736. Its totient is φ = 18632964720.

The previous prime is 55909244771. The next prime is 55909244777. The reversal of 55909244772 is 27744290955.

55909244772 is a `hidden beast` number, since 5 + 590 + 9 + 2 + 4 + 47 + 7 + 2 = 666.

55909244772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (55909244771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57247 + ... + 339257.

It is an arithmetic number, because the mean of its divisors is an integer number (3926453076).

Almost surely, 2^55909244772 is an apocalyptic number.

It is an amenable number.

55909244772 is an abundant number, since it is smaller than the sum of its proper divisors (85443065964).

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

55909244772 is a wasteful number, since it uses less digits than its factorization.

55909244772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287528 (or 287523 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 55909244772 in words is "fifty-five billion, nine hundred nine million, two hundred forty-four thousand, seven hundred seventy-two".