6990209144 has 16 divisors (see below), whose sum is σ = 13126012200. Its totient is φ = 3489939232.

The previous prime is 6990209113. The next prime is 6990209153. The reversal of 6990209144 is 4419020996.

It is a super-2 number, since 2×6990209144² = 97726047753722425472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6990209095 and 6990209104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639914 + ... + 650745.

Almost surely, 2^6990209144 is an apocalyptic number.

It is an amenable number.

6990209144 is a deficient number, since it is larger than the sum of its proper divisors (6135803056).

6990209144 is a wasteful number, since it uses less digits than its factorization.

6990209144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291342 (or 1291338 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 6990209144 is about 83607.4706231447. The cubic root of 6990209144 is about 1912.0388983584.

The spelling of 6990209144 in words is "six billion, nine hundred ninety million, two hundred nine thousand, one hundred forty-four".