54172143855 has 24 divisors (see below), whose sum is σ = 93952083888. Its totient is φ = 28875286656.

The previous prime is 54172143833. The next prime is 54172143863. The reversal of 54172143855 is 55834127145.

54172143855 is a `hidden beast` number, since 54 + 1 + 7 + 214 + 385 + 5 = 666.

It is not a de Polignac number, because 54172143855 - 2¹⁰ = 54172142831 is a prime.

It is a super-2 number, since 2×54172143855² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 54172143855.

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, 264477 + ... + 422246.

It is an arithmetic number, because the mean of its divisors is an integer number (3914670162).

Almost surely, 2^54172143855 is an apocalyptic number.

54172143855 is a deficient number, since it is larger than the sum of its proper divisors (39779940033).

54172143855 is a wasteful number, since it uses less digits than its factorization.

54172143855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688487 (or 688484 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The spelling of 54172143855 in words is "fifty-four billion, one hundred seventy-two million, one hundred forty-three thousand, eight hundred fifty-five".