1689925294956 has 12 divisors (see below), whose sum is σ = 3943159021592. Its totient is φ = 563308431648.

The previous prime is 1689925294951. The next prime is 1689925294969. The reversal of 1689925294956 is 6594925299861.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1689925294951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70413553945 + ... + 70413553968.

Almost surely, 2^{1689925294956} is an apocalyptic number.

It is an amenable number.

1689925294956 is an abundant number, since it is smaller than the sum of its proper divisors (2253233726636).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1689925294956 is a wasteful number, since it uses less digits than its factorization.

1689925294956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140827107920 (or 140827107918 counting only the distinct ones).

The product of its digits is 755827200, while the sum is 75.

The spelling of 1689925294956 in words is "one trillion, six hundred eighty-nine billion, nine hundred twenty-five million, two hundred ninety-four thousand, nine hundred fifty-six".