21604070141617 has 8 divisors (see below), whose sum is σ = 22748117346560. Its totient is φ = 20460722024880.

The previous prime is 21604070141573. The next prime is 21604070141669. The reversal of 21604070141617 is 71614107040612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21604070141617 - 2³⁹ = 21054314327729 is a prime.

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 21604070141617.

It is not an unprimeable number, because it can be changed into a prime (21604070141917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174708609 + ... + 174832222.

It is an arithmetic number, because the mean of its divisors is an integer number (2843514668320).

Almost surely, 2^{21604070141617} is an apocalyptic number.

It is an amenable number.

21604070141617 is a deficient number, since it is larger than the sum of its proper divisors (1144047204943).

21604070141617 is a wasteful number, since it uses less digits than its factorization.

21604070141617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349544103.

The product of its (nonzero) digits is 56448, while the sum is 40.

The spelling of 21604070141617 in words is "twenty-one trillion, six hundred four billion, seventy million, one hundred forty-one thousand, six hundred seventeen".