1689401786039 has 16 divisors (see below), whose sum is σ = 1863342157824. Its totient is φ = 1518947445600.

The previous prime is 1689401785927. The next prime is 1689401786053. The reversal of 1689401786039 is 9306871049861.

It is a cyclic number.

It is not a de Polignac number, because 1689401786039 - 2¹² = 1689401781943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689401785039) 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, 1960499 + ... + 2687444.

It is an arithmetic number, because the mean of its divisors is an integer number (116458884864).

Almost surely, 2^{1689401786039} is an apocalyptic number.

1689401786039 is a deficient number, since it is larger than the sum of its proper divisors (173940371785).

1689401786039 is a wasteful number, since it uses less digits than its factorization.

1689401786039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4648318.

The product of its (nonzero) digits is 15676416, while the sum is 62.

The spelling of 1689401786039 in words is "one trillion, six hundred eighty-nine billion, four hundred one million, seven hundred eighty-six thousand, thirty-nine".