1687020016855 has 8 divisors (see below), whose sum is σ = 2112442456032. Its totient is φ = 1290937056288.

The previous prime is 1687020016823. The next prime is 1687020016883. The reversal of 1687020016855 is 5586100207861.

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

It is a cyclic number.

It is not a de Polignac number, because 1687020016855 - 2⁵ = 1687020016823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1687020016799 and 1687020016808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7334869524 + ... + 7334869753.

It is an arithmetic number, because the mean of its divisors is an integer number (264055307004).

Almost surely, 2^{1687020016855} is an apocalyptic number.

1687020016855 is a deficient number, since it is larger than the sum of its proper divisors (425422439177).

1687020016855 is a wasteful number, since it uses less digits than its factorization.

1687020016855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14669739305.

The product of its (nonzero) digits is 806400, while the sum is 49.

The spelling of 1687020016855 in words is "one trillion, six hundred eighty-seven billion, twenty million, sixteen thousand, eight hundred fifty-five".