1629682791917 has 2 divisors, whose sum is σ = 1629682791918. Its totient is φ = 1629682791916.

The previous prime is 1629682791833. The next prime is 1629682791941. The reversal of 1629682791917 is 7191972869261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1557419137156 + 72263654761 = 1247966^2 + 268819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1629682791917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1629682791977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 814841395958 + 814841395959.

It is an arithmetic number, because the mean of its divisors is an integer number (814841395959).

Almost surely, 2^{1629682791917} is an apocalyptic number.

It is an amenable number.

1629682791917 is a deficient number, since it is larger than the sum of its proper divisors (1).

1629682791917 is an equidigital number, since it uses as much as digits as its factorization.

1629682791917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41150592, while the sum is 68.

The spelling of 1629682791917 in words is "one trillion, six hundred twenty-nine billion, six hundred eighty-two million, seven hundred ninety-one thousand, nine hundred seventeen".