7091898868 has 6 divisors (see below), whose sum is σ = 12410823026. Its totient is φ = 3545949432.

The previous prime is 7091898859. The next prime is 7091898899. The reversal of 7091898868 is 8688981907.

It can be written as a sum of positive squares in only one way, i.e., 6946889104 + 145009764 = 83348^2 + 12042^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 886487355 + ... + 886487362.

Almost surely, 2^7091898868 is an apocalyptic number.

It is an amenable number.

7091898868 is a deficient number, since it is larger than the sum of its proper divisors (5318924158).

7091898868 is a wasteful number, since it uses less digits than its factorization.

7091898868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772974721 (or 1772974719 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 64.

The square root of 7091898868 is about 84213.4126371803. The cubic root of 7091898868 is about 1921.2660620290.

The spelling of 7091898868 in words is "seven billion, ninety-one million, eight hundred ninety-eight thousand, eight hundred sixty-eight".