55478722685 has 16 divisors (see below), whose sum is σ = 68313238272. Its totient is φ = 43232750400.

The previous prime is 55478722681. The next prime is 55478722703. The reversal of 55478722685 is 58622787455.

55478722685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55478722685 - 2² = 55478722681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55478722681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 509846 + ... + 609015.

It is an arithmetic number, because the mean of its divisors is an integer number (4269577392).

Almost surely, 2^55478722685 is an apocalyptic number.

It is an amenable number.

55478722685 is a deficient number, since it is larger than the sum of its proper divisors (12834515587).

55478722685 is a wasteful number, since it uses less digits than its factorization.

55478722685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119124.

The product of its digits is 37632000, while the sum is 59.

The spelling of 55478722685 in words is "fifty-five billion, four hundred seventy-eight million, seven hundred twenty-two thousand, six hundred eighty-five".