6191887508887 has 4 divisors (see below), whose sum is σ = 6359235819976. Its totient is φ = 6024539197800.

The previous prime is 6191887508843. The next prime is 6191887508897. The reversal of 6191887508887 is 7888057881916.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6191887508887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6191887508827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83674155489 + ... + 83674155562.

It is an arithmetic number, because the mean of its divisors is an integer number (1589808954994).

Almost surely, 2^{6191887508887} is an apocalyptic number.

6191887508887 is a deficient number, since it is larger than the sum of its proper divisors (167348311089).

6191887508887 is a wasteful number, since it uses less digits than its factorization.

6191887508887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167348311088.

The product of its (nonzero) digits is 433520640, while the sum is 76.

The spelling of 6191887508887 in words is "six trillion, one hundred ninety-one billion, eight hundred eighty-seven million, five hundred eight thousand, eight hundred eighty-seven".