55144398834 has 128 divisors (see below), whose sum is σ = 146396160000. Its totient is φ = 15043938624.

The previous prime is 55144398781. The next prime is 55144398893. The reversal of 55144398834 is 43889344155.

It is a happy number.

55144398834 is a `hidden beast` number, since 5 + 514 + 4 + 3 + 98 + 8 + 34 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5202412 + ... + 5213000.

It is an arithmetic number, because the mean of its divisors is an integer number (1143720000).

Almost surely, 2^55144398834 is an apocalyptic number.

55144398834 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55144398834, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73198080000).

55144398834 is an abundant number, since it is smaller than the sum of its proper divisors (91251761166).

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

55144398834 is a wasteful number, since it uses less digits than its factorization.

55144398834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11229 (or 11223 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 54.

The spelling of 55144398834 in words is "fifty-five billion, one hundred forty-four million, three hundred ninety-eight thousand, eight hundred thirty-four".