55487478455 has 16 divisors (see below), whose sum is σ = 68058040320. Its totient is φ = 43418442912.

The previous prime is 55487478443. The next prime is 55487478461.

55487478455 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 55487478455 - 2⁸ = 55487478199 is a prime.

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, 614159 + ... + 698688.

It is an arithmetic number, because the mean of its divisors is an integer number (4253627520).

Almost surely, 2^55487478455 is an apocalyptic number.

55487478455 is a deficient number, since it is larger than the sum of its proper divisors (12570561865).

55487478455 is a wasteful number, since it uses less digits than its factorization.

55487478455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313038.

The product of its digits is 125440000, while the sum is 62.

The spelling of 55487478455 in words is "fifty-five billion, four hundred eighty-seven million, four hundred seventy-eight thousand, four hundred fifty-five".