1687889875507 has 8 divisors (see below), whose sum is σ = 1841345296560. Its totient is φ = 1534436268960.

The previous prime is 1687889875489. The next prime is 1687889875519. The reversal of 1687889875507 is 7055789887861.

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-1687889875507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1687889875207) 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, 2132373 + ... + 2814745.

It is an arithmetic number, because the mean of its divisors is an integer number (230168162070).

Almost surely, 2^{1687889875507} is an apocalyptic number.

1687889875507 is a deficient number, since it is larger than the sum of its proper divisors (153455421053).

1687889875507 is a wasteful number, since it uses less digits than its factorization.

1687889875507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907253.

The product of its (nonzero) digits is 1896652800, while the sum is 79.

The spelling of 1687889875507 in words is "one trillion, six hundred eighty-seven billion, eight hundred eighty-nine million, eight hundred seventy-five thousand, five hundred seven".