7911649867 has 16 divisors (see below), whose sum is σ = 8722909440. Its totient is φ = 7115836000.

The previous prime is 7911649861. The next prime is 7911649891. The reversal of 7911649867 is 7689461197.

It is a cyclic number.

It is not a de Polignac number, because 7911649867 - 2¹¹ = 7911647819 is a prime.

It is a super-2 number, since 2×7911649867² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7911649861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2690484 + ... + 2693422.

It is an arithmetic number, because the mean of its divisors is an integer number (545181840).

Almost surely, 2^7911649867 is an apocalyptic number.

7911649867 is a deficient number, since it is larger than the sum of its proper divisors (811259573).

7911649867 is a wasteful number, since it uses less digits than its factorization.

7911649867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474.

The product of its digits is 4572288, while the sum is 58.

The square root of 7911649867 is about 88947.4556521995. The cubic root of 7911649867 is about 1992.6102181074.

The spelling of 7911649867 in words is "seven billion, nine hundred eleven million, six hundred forty-nine thousand, eight hundred sixty-seven".