2154561344202 has 32 divisors (see below), whose sum is σ = 4390645321152. Its totient is φ = 704601357824.

The previous prime is 2154561344179. The next prime is 2154561344207. The reversal of 2154561344202 is 2024431654512.

It is not an unprimeable number, because it can be changed into a prime (2154561344207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6668698 + ... + 6984314.

It is an arithmetic number, because the mean of its divisors is an integer number (137207666286).

Almost surely, 2^{2154561344202} is an apocalyptic number.

2154561344202 is an abundant number, since it is smaller than the sum of its proper divisors (2236083976950).

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

2154561344202 is a wasteful number, since it uses less digits than its factorization.

2154561344202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337142.

The product of its (nonzero) digits is 230400, while the sum is 39.

Adding to 2154561344202 its reverse (2024431654512), we get a palindrome (4178992998714).

The spelling of 2154561344202 in words is "two trillion, one hundred fifty-four billion, five hundred sixty-one million, three hundred forty-four thousand, two hundred two".