1689106254887 has 8 divisors (see below), whose sum is σ = 1702600499952. Its totient is φ = 1675621105600.

The previous prime is 1689106254863. The next prime is 1689106254907. The reversal of 1689106254887 is 7884526019861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689106254887 is a prime.

It is a super-2 number, since 2×1689106254887² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689106251887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900814 + ... + 2644107.

It is an arithmetic number, because the mean of its divisors is an integer number (212825062494).

Almost surely, 2^{1689106254887} is an apocalyptic number.

1689106254887 is a deficient number, since it is larger than the sum of its proper divisors (13494245065).

1689106254887 is a wasteful number, since it uses less digits than its factorization.

1689106254887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4547889.

The product of its (nonzero) digits is 46448640, while the sum is 65.

The spelling of 1689106254887 in words is "one trillion, six hundred eighty-nine billion, one hundred six million, two hundred fifty-four thousand, eight hundred eighty-seven".