5121656644543 has 16 divisors (see below), whose sum is σ = 5282826614784. Its totient is φ = 4962720440160.

The previous prime is 5121656644487. The next prime is 5121656644549. The reversal of 5121656644543 is 3454466561215.

It is a cyclic number.

It is not a de Polignac number, because 5121656644543 - 2⁹ = 5121656644031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121656644549) 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, 7712458 + ... + 8350168.

It is an arithmetic number, because the mean of its divisors is an integer number (330176663424).

Almost surely, 2^{5121656644543} is an apocalyptic number.

5121656644543 is a deficient number, since it is larger than the sum of its proper divisors (161169970241).

5121656644543 is a wasteful number, since it uses less digits than its factorization.

5121656644543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639462.

The product of its digits is 10368000, while the sum is 52.

The spelling of 5121656644543 in words is "five trillion, one hundred twenty-one billion, six hundred fifty-six million, six hundred forty-four thousand, five hundred forty-three".