544767131621 has 2 divisors, whose sum is σ = 544767131622. Its totient is φ = 544767131620.

The previous prime is 544767131609. The next prime is 544767131627. The reversal of 544767131621 is 126131767445.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342325627396 + 202441504225 = 585086^2 + 449935^2 .

It is a cyclic number.

It is not a de Polignac number, because 544767131621 - 2¹⁰ = 544767130597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (544767131627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272383565810 + 272383565811.

It is an arithmetic number, because the mean of its divisors is an integer number (272383565811).

Almost surely, 2^544767131621 is an apocalyptic number.

It is an amenable number.

544767131621 is a deficient number, since it is larger than the sum of its proper divisors (1).

544767131621 is an equidigital number, since it uses as much as digits as its factorization.

544767131621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 47.

The spelling of 544767131621 in words is "five hundred forty-four billion, seven hundred sixty-seven million, one hundred thirty-one thousand, six hundred twenty-one".