6156917987 has 16 divisors (see below), whose sum is σ = 6743040000. Its totient is φ = 5575249440.

The previous prime is 6156917981. The next prime is 6156918007. The reversal of 6156917987 is 7897196516.

It is a cyclic number.

It is not a de Polignac number, because 6156917987 - 2¹² = 6156913891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6156917981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4813214 + ... + 4814492.

It is an arithmetic number, because the mean of its divisors is an integer number (421440000).

Almost surely, 2^6156917987 is an apocalyptic number.

6156917987 is a deficient number, since it is larger than the sum of its proper divisors (586122013).

6156917987 is a wasteful number, since it uses less digits than its factorization.

6156917987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666.

The product of its digits is 5715360, while the sum is 59.

The square root of 6156917987 is about 78466.0307840278. The cubic root of 6156917987 is about 1832.8255183028.

The spelling of 6156917987 in words is "six billion, one hundred fifty-six million, nine hundred seventeen thousand, nine hundred eighty-seven".