623366125549 has 2 divisors, whose sum is σ = 623366125550. Its totient is φ = 623366125548.

The previous prime is 623366125519. The next prime is 623366125567. The reversal of 623366125549 is 945521663326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583553904649 + 39812220900 = 763907^2 + 199530^2 .

It is a cyclic number.

It is not a de Polignac number, because 623366125549 - 2¹³ = 623366117357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623366125496 and 623366125505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623366125519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311683062774 + 311683062775.

It is an arithmetic number, because the mean of its divisors is an integer number (311683062775).

Almost surely, 2^623366125549 is an apocalyptic number.

It is an amenable number.

623366125549 is a deficient number, since it is larger than the sum of its proper divisors (1).

623366125549 is an equidigital number, since it uses as much as digits as its factorization.

623366125549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 52.

The spelling of 623366125549 in words is "six hundred twenty-three billion, three hundred sixty-six million, one hundred twenty-five thousand, five hundred forty-nine".