21615602602143 has 16 divisors (see below), whose sum is σ = 32034100599936. Its totient is φ = 12853188510240.

The previous prime is 21615602602133. The next prime is 21615602602151. The reversal of 21615602602143 is 34120620651612.

It is not a de Polignac number, because 21615602602143 - 2⁹ = 21615602601631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21615602602133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6179415805 + ... + 6179419302.

It is an arithmetic number, because the mean of its divisors is an integer number (2002131287496).

Almost surely, 2^{21615602602143} is an apocalyptic number.

21615602602143 is a deficient number, since it is larger than the sum of its proper divisors (10418497997793).

21615602602143 is a wasteful number, since it uses less digits than its factorization.

21615602602143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12358835174.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 21615602602143 in words is "twenty-one trillion, six hundred fifteen billion, six hundred two million, six hundred two thousand, one hundred forty-three".