55506649518 has 48 divisors (see below), whose sum is σ = 125182577520. Its totient is φ = 18433391616.

The previous prime is 55506649483. The next prime is 55506649531. The reversal of 55506649518 is 81594660555.

55506649518 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81555 + ... + 343022.

It is an arithmetic number, because the mean of its divisors is an integer number (2607970365).

Almost surely, 2^55506649518 is an apocalyptic number.

55506649518 is an abundant number, since it is smaller than the sum of its proper divisors (69675928002).

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

55506649518 is a wasteful number, since it uses less digits than its factorization.

55506649518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424863 (or 424851 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 54.

The spelling of 55506649518 in words is "fifty-five billion, five hundred six million, six hundred forty-nine thousand, five hundred eighteen".