1689741638079 has 16 divisors (see below), whose sum is σ = 2499463751040. Its totient is φ = 1006728452960.

The previous prime is 1689741638063. The next prime is 1689741638119. The reversal of 1689741638079 is 9708361479861.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1689741638079 - 2⁴ = 1689741638063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689741438079) 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, 433932732 + ... + 433936625.

It is an arithmetic number, because the mean of its divisors is an integer number (156216484440).

Almost surely, 2^{1689741638079} is an apocalyptic number.

1689741638079 is a deficient number, since it is larger than the sum of its proper divisors (809722112961).

1689741638079 is a wasteful number, since it uses less digits than its factorization.

1689741638079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867869430.

The product of its (nonzero) digits is 109734912, while the sum is 69.

The spelling of 1689741638079 in words is "one trillion, six hundred eighty-nine billion, seven hundred forty-one million, six hundred thirty-eight thousand, seventy-nine".