21725132632617 has 16 divisors (see below), whose sum is σ = 30662576936640. Its totient is φ = 13658784267072.

The previous prime is 21725132632591. The next prime is 21725132632631. The reversal of 21725132632617 is 71623623152712.

It is not a de Polignac number, because 21725132632617 - 2¹¹ = 21725132630569 is a prime.

It is a super-2 number, since 2×21725132632617² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21725132632517) 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, 2903649378 + ... + 2903656859.

It is an arithmetic number, because the mean of its divisors is an integer number (1916411058540).

Almost surely, 2^{21725132632617} is an apocalyptic number.

It is an amenable number.

21725132632617 is a deficient number, since it is larger than the sum of its proper divisors (8937444304023).

21725132632617 is a wasteful number, since it uses less digits than its factorization.

21725132632617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5807306312.

The product of its digits is 1270080, while the sum is 48.

The spelling of 21725132632617 in words is "twenty-one trillion, seven hundred twenty-five billion, one hundred thirty-two million, six hundred thirty-two thousand, six hundred seventeen".