615604204401 has 4 divisors (see below), whose sum is σ = 820805605872. Its totient is φ = 410402802932.

The previous prime is 615604204387. The next prime is 615604204403. The reversal of 615604204401 is 104402406516.

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 a cyclic number.

It is not a de Polignac number, because 615604204401 - 2⁶ = 615604204337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (615604204403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102600700731 + ... + 102600700736.

It is an arithmetic number, because the mean of its divisors is an integer number (205201401468).

Almost surely, 2^615604204401 is an apocalyptic number.

It is an amenable number.

615604204401 is a deficient number, since it is larger than the sum of its proper divisors (205201401471).

615604204401 is a wasteful number, since it uses less digits than its factorization.

615604204401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205201401470.

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 615604204401 in words is "six hundred fifteen billion, six hundred four million, two hundred four thousand, four hundred one".