6544438158862 has 4 divisors (see below), whose sum is σ = 9816657238296. Its totient is φ = 3272219079430.

The previous prime is 6544438158787. The next prime is 6544438158883. The reversal of 6544438158862 is 2688518344456.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 6544438158794 and 6544438158803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1636109539714 + ... + 1636109539717.

It is an arithmetic number, because the mean of its divisors is an integer number (2454164309574).

Almost surely, 2^{6544438158862} is an apocalyptic number.

6544438158862 is a deficient number, since it is larger than the sum of its proper divisors (3272219079434).

6544438158862 is a wasteful number, since it uses less digits than its factorization.

6544438158862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3272219079433.

The product of its digits is 176947200, while the sum is 64.

The spelling of 6544438158862 in words is "six trillion, five hundred forty-four billion, four hundred thirty-eight million, one hundred fifty-eight thousand, eight hundred sixty-two".