409564490997 has 4 divisors (see below), whose sum is σ = 546085988000. Its totient is φ = 273042993996.

The previous prime is 409564490987. The next prime is 409564491013. The reversal of 409564490997 is 799094465904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 409564490997 - 2¹⁰ = 409564489973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409564490987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68260748497 + ... + 68260748502.

It is an arithmetic number, because the mean of its divisors is an integer number (136521497000).

Almost surely, 2^409564490997 is an apocalyptic number.

It is an amenable number.

409564490997 is a deficient number, since it is larger than the sum of its proper divisors (136521497003).

409564490997 is a wasteful number, since it uses less digits than its factorization.

409564490997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136521497002.

The product of its (nonzero) digits is 88179840, while the sum is 66.

The spelling of 409564490997 in words is "four hundred nine billion, five hundred sixty-four million, four hundred ninety thousand, nine hundred ninety-seven".