21616051044601 has 16 divisors (see below), whose sum is σ = 24351523056000. Its totient is φ = 19038148588800.

The previous prime is 21616051044583. The next prime is 21616051044617. The reversal of 21616051044601 is 10644015061612.

It is a cyclic number.

It is not a de Polignac number, because 21616051044601 - 2⁵ = 21616051044569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21616051044101) 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, 90022851 + ... + 90262648.

It is an arithmetic number, because the mean of its divisors is an integer number (1521970191000).

Almost surely, 2^{21616051044601} is an apocalyptic number.

It is an amenable number.

21616051044601 is a deficient number, since it is larger than the sum of its proper divisors (2735472011399).

21616051044601 is a wasteful number, since it uses less digits than its factorization.

21616051044601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180285936.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 21616051044601 in words is "twenty-one trillion, six hundred sixteen billion, fifty-one million, forty-four thousand, six hundred one".