543610406621 has 2 divisors, whose sum is σ = 543610406622. Its totient is φ = 543610406620.

The previous prime is 543610406617. The next prime is 543610406629. The reversal of 543610406621 is 126604016345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529045296025 + 14565110596 = 727355^2 + 120686^2 .

It is a cyclic number.

It is not a de Polignac number, because 543610406621 - 2² = 543610406617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543610406629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271805203310 + 271805203311.

It is an arithmetic number, because the mean of its divisors is an integer number (271805203311).

Almost surely, 2^543610406621 is an apocalyptic number.

It is an amenable number.

543610406621 is a deficient number, since it is larger than the sum of its proper divisors (1).

543610406621 is an equidigital number, since it uses as much as digits as its factorization.

543610406621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 543610406621 in words is "five hundred forty-three billion, six hundred ten million, four hundred six thousand, six hundred twenty-one".