405487400399 has 2 divisors, whose sum is σ = 405487400400. Its totient is φ = 405487400398.

The previous prime is 405487400347. The next prime is 405487400429. The reversal of 405487400399 is 993004784504.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405487400399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 405487400399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405487400309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202743700199 + 202743700200.

It is an arithmetic number, because the mean of its divisors is an integer number (202743700200).

Almost surely, 2^405487400399 is an apocalyptic number.

405487400399 is a deficient number, since it is larger than the sum of its proper divisors (1).

405487400399 is an equidigital number, since it uses as much as digits as its factorization.

405487400399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 405487400399 in words is "four hundred five billion, four hundred eighty-seven million, four hundred thousand, three hundred ninety-nine".