1689861934958 has 4 divisors (see below), whose sum is σ = 2534792902440. Its totient is φ = 844930967478.

The previous prime is 1689861934921. The next prime is 1689861934991. The reversal of 1689861934958 is 8594391689861.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422465483738 + ... + 422465483741.

It is an arithmetic number, because the mean of its divisors is an integer number (633698225610).

Almost surely, 2^{1689861934958} is an apocalyptic number.

1689861934958 is a deficient number, since it is larger than the sum of its proper divisors (844930967482).

1689861934958 is an equidigital number, since it uses as much as digits as its factorization.

1689861934958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844930967481.

The product of its digits is 806215680, while the sum is 77.

The spelling of 1689861934958 in words is "one trillion, six hundred eighty-nine billion, eight hundred sixty-one million, nine hundred thirty-four thousand, nine hundred fifty-eight".