17215939977983 has 2 divisors, whose sum is σ = 17215939977984. Its totient is φ = 17215939977982.

The previous prime is 17215939977961. The next prime is 17215939978031. The reversal of 17215939977983 is 38977993951271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17215939977983 - 2¹⁴ = 17215939961599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17215939977898 and 17215939977907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17215939971983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8607969988991 + 8607969988992.

It is an arithmetic number, because the mean of its divisors is an integer number (8607969988992).

Almost surely, 2^{17215939977983} is an apocalyptic number.

17215939977983 is a deficient number, since it is larger than the sum of its proper divisors (1).

17215939977983 is an equidigital number, since it uses as much as digits as its factorization.

17215939977983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1620304560, while the sum is 80.

The spelling of 17215939977983 in words is "seventeen trillion, two hundred fifteen billion, nine hundred thirty-nine million, nine hundred seventy-seven thousand, nine hundred eighty-three".