6983561644 has 24 divisors (see below), whose sum is σ = 13040691440. Its totient is φ = 3262685184.

The previous prime is 6983561639. The next prime is 6983561677. The reversal of 6983561644 is 4461653896.

It is a happy number.

It is a super-3 number, since 3×6983561644³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6983561591 and 6983561600.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623829 + ... + 634924.

Almost surely, 2^6983561644 is an apocalyptic number.

It is an amenable number.

6983561644 is a deficient number, since it is larger than the sum of its proper divisors (6057129796).

6983561644 is a wasteful number, since it uses less digits than its factorization.

6983561644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258849 (or 1258847 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 52.

The square root of 6983561644 is about 83567.7069447284. The cubic root of 6983561644 is about 1911.4326070211.

The spelling of 6983561644 in words is "six billion, nine hundred eighty-three million, five hundred sixty-one thousand, six hundred forty-four".