21655032604616 has 16 divisors (see below), whose sum is σ = 40603257809100. Its totient is φ = 10827497188864.

The previous prime is 21655032604613. The next prime is 21655032604633. The reversal of 21655032604616 is 61640623055612.

It can be written as a sum of positive squares in 2 ways, for example, as 21622072202116 + 32960402500 = 4649954^2 + 181550^2 .

It is not an unprimeable number, because it can be changed into a prime (21655032604613) 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, 3193220 + ... + 7314828.

Almost surely, 2^{21655032604616} is an apocalyptic number.

It is an amenable number.

21655032604616 is a deficient number, since it is larger than the sum of its proper divisors (18948225204484).

21655032604616 is a wasteful number, since it uses less digits than its factorization.

21655032604616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4778368 (or 4778364 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 21655032604616 in words is "twenty-one trillion, six hundred fifty-five billion, thirty-two million, six hundred four thousand, six hundred sixteen".