409991603061 has 4 divisors (see below), whose sum is σ = 546655470752. Its totient is φ = 273327735372.

The previous prime is 409991603027. The next prime is 409991603071. The reversal of 409991603061 is 160306199904.

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 409991603061 - 2⁶ = 409991602997 is a prime.

It is a super-2 number, since 2×409991603061² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 409991603061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409991603071) 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, 68331933841 + ... + 68331933846.

It is an arithmetic number, because the mean of its divisors is an integer number (136663867688).

Almost surely, 2^409991603061 is an apocalyptic number.

It is an amenable number.

409991603061 is a deficient number, since it is larger than the sum of its proper divisors (136663867691).

409991603061 is a wasteful number, since it uses less digits than its factorization.

409991603061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136663867690.

The product of its (nonzero) digits is 314928, while the sum is 48.

The spelling of 409991603061 in words is "four hundred nine billion, nine hundred ninety-one million, six hundred three thousand, sixty-one".