2155444154442 has 96 divisors (see below), whose sum is σ = 4887781516800. Its totient is φ = 685621915776.

The previous prime is 2155444154399. The next prime is 2155444154467. The reversal of 2155444154442 is 2444514445512.

2155444154442 is a `hidden beast` number, since 2 + 1 + 5 + 54 + 4 + 4 + 154 + 442 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16113828 + ... + 16247040.

It is an arithmetic number, because the mean of its divisors is an integer number (50914390800).

Almost surely, 2^{2155444154442} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2155444154442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2443890758400).

2155444154442 is an abundant number, since it is smaller than the sum of its proper divisors (2732337362358).

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

2155444154442 is a wasteful number, since it uses less digits than its factorization.

2155444154442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133612 (or 133609 counting only the distinct ones).

The product of its digits is 2048000, while the sum is 45.

Adding to 2155444154442 its reverse (2444514445512), we get a palindrome (4599958599954).

The spelling of 2155444154442 in words is "two trillion, one hundred fifty-five billion, four hundred forty-four million, one hundred fifty-four thousand, four hundred forty-two".