409861161615 has 128 divisors (see below), whose sum is σ = 765340047360. Its totient is φ = 185780846592.

The previous prime is 409861161559. The next prime is 409861161617. The reversal of 409861161615 is 516161168904.

409861161615 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 640204²-1.

It is not a de Polignac number, because 409861161615 - 2¹³ = 409861153423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (409861161617) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 32644179 + ... + 32656731.

It is an arithmetic number, because the mean of its divisors is an integer number (5979219120).

Almost surely, 2^409861161615 is an apocalyptic number.

409861161615 is a deficient number, since it is larger than the sum of its proper divisors (355478885745).

409861161615 is a wasteful number, since it uses less digits than its factorization.

409861161615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12913.

The product of its (nonzero) digits is 311040, while the sum is 48.

The spelling of 409861161615 in words is "four hundred nine billion, eight hundred sixty-one million, one hundred sixty-one thousand, six hundred fifteen".