55143553455 has 48 divisors (see below), whose sum is σ = 99166788864. Its totient is φ = 28316574720.

The previous prime is 55143553427. The next prime is 55143553459. The reversal of 55143553455 is 55435534155.

55143553455 is a `hidden beast` number, since 5 + 5 + 1 + 43 + 553 + 4 + 55 = 666.

It is not a de Polignac number, because 55143553455 - 2¹² = 55143549359 is a prime.

It is a super-2 number, since 2×55143553455² (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 55143553455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55143553459) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174487 + ... + 375143.

It is an arithmetic number, because the mean of its divisors is an integer number (2065974768).

Almost surely, 2^55143553455 is an apocalyptic number.

55143553455 is a deficient number, since it is larger than the sum of its proper divisors (44023235409).

55143553455 is a wasteful number, since it uses less digits than its factorization.

55143553455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200896 (or 200893 counting only the distinct ones).

The product of its digits is 2250000, while the sum is 45.

The spelling of 55143553455 in words is "fifty-five billion, one hundred forty-three million, five hundred fifty-three thousand, four hundred fifty-five".