399467518553 has 2 divisors, whose sum is σ = 399467518554. Its totient is φ = 399467518552.

The previous prime is 399467518531. The next prime is 399467518561. The reversal of 399467518553 is 355815764993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246659235904 + 152808282649 = 496648^2 + 390907^2 .

It is a cyclic number.

It is not a de Polignac number, because 399467518553 - 2¹⁰ = 399467517529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399467518553.

It is not a weakly prime, because it can be changed into another prime (399467518753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199733759276 + 199733759277.

It is an arithmetic number, because the mean of its divisors is an integer number (199733759277).

Almost surely, 2^399467518553 is an apocalyptic number.

It is an amenable number.

399467518553 is a deficient number, since it is larger than the sum of its proper divisors (1).

399467518553 is an equidigital number, since it uses as much as digits as its factorization.

399467518553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472000, while the sum is 65.

The spelling of 399467518553 in words is "three hundred ninety-nine billion, four hundred sixty-seven million, five hundred eighteen thousand, five hundred fifty-three".