1691217496763 has 2 divisors, whose sum is σ = 1691217496764. Its totient is φ = 1691217496762.

The previous prime is 1691217496747. The next prime is 1691217496847. The reversal of 1691217496763 is 3676947121961.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1691217496763 - 2⁴ = 1691217496747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1691217496696 and 1691217496705.

It is not a weakly prime, because it can be changed into another prime (1691217196763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845608748381 + 845608748382.

It is an arithmetic number, because the mean of its divisors is an integer number (845608748382).

Almost surely, 2^{1691217496763} is an apocalyptic number.

1691217496763 is a deficient number, since it is larger than the sum of its proper divisors (1).

1691217496763 is an equidigital number, since it uses as much as digits as its factorization.

1691217496763 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 62.

The spelling of 1691217496763 in words is "one trillion, six hundred ninety-one billion, two hundred seventeen million, four hundred ninety-six thousand, seven hundred sixty-three".