21601677310671 has 16 divisors (see below), whose sum is σ = 28813483722240. Its totient is φ = 14395495671360.

The previous prime is 21601677310651. The next prime is 21601677310711. The reversal of 21601677310671 is 17601377610612.

It is not a de Polignac number, because 21601677310671 - 2²³ = 21601668922063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21601677310671.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21601677310651) 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, 80103700 + ... + 80372918.

It is an arithmetic number, because the mean of its divisors is an integer number (1800842732640).

Almost surely, 2^{21601677310671} is an apocalyptic number.

21601677310671 is a deficient number, since it is larger than the sum of its proper divisors (7211806411569).

21601677310671 is a wasteful number, since it uses less digits than its factorization.

21601677310671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279566.

The product of its (nonzero) digits is 444528, while the sum is 48.

The spelling of 21601677310671 in words is "twenty-one trillion, six hundred one billion, six hundred seventy-seven million, three hundred ten thousand, six hundred seventy-one".