409799079541 has 4 divisors (see below), whose sum is σ = 419794179084. Its totient is φ = 399803980000.

The previous prime is 409799079523. The next prime is 409799079581. The reversal of 409799079541 is 145970997904.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186174127441 + 223624952100 = 431479^2 + 472890^2 .

It is a cyclic number.

It is not a de Polignac number, because 409799079541 - 2¹⁵ = 409799046773 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 (409799079511) 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, 4997549710 + ... + 4997549791.

It is an arithmetic number, because the mean of its divisors is an integer number (104948544771).

Almost surely, 2^409799079541 is an apocalyptic number.

409799079541 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

409799079541 is a deficient number, since it is larger than the sum of its proper divisors (9995099543).

409799079541 is an equidigital number, since it uses as much as digits as its factorization.

409799079541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9995099542.

The product of its (nonzero) digits is 25719120, while the sum is 64.

The spelling of 409799079541 in words is "four hundred nine billion, seven hundred ninety-nine million, seventy-nine thousand, five hundred forty-one".