21601676527725 has 48 divisors (see below), whose sum is σ = 40826510686080. Its totient is φ = 9872722636800.

The previous prime is 21601676527721. The next prime is 21601676527751. The reversal of 21601676527725 is 52772567610612.

It is a happy number.

It is not a de Polignac number, because 21601676527725 - 2² = 21601676527721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21601676527721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2624460 + ... + 7077509.

It is an arithmetic number, because the mean of its divisors is an integer number (850552305960).

Almost surely, 2^{21601676527725} is an apocalyptic number.

21601676527725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21601676527725 is a deficient number, since it is larger than the sum of its proper divisors (19224834158355).

21601676527725 is a wasteful number, since it uses less digits than its factorization.

21601676527725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9706230 (or 9706225 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 57.

The spelling of 21601676527725 in words is "twenty-one trillion, six hundred one billion, six hundred seventy-six million, five hundred twenty-seven thousand, seven hundred twenty-five".