2061669644 has 12 divisors (see below), whose sum is σ = 3608913000. Its totient is φ = 1030551648.

The previous prime is 2061669629. The next prime is 2061669697. The reversal of 2061669644 is 4469661602.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2061669595 and 2061669604.

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, 53969 + ... + 83880.

It is an arithmetic number, because the mean of its divisors is an integer number (300742750).

Almost surely, 2^2061669644 is an apocalyptic number.

It is an amenable number.

2061669644 is a deficient number, since it is larger than the sum of its proper divisors (1547243356).

2061669644 is a wasteful number, since it uses less digits than its factorization.

2061669644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141592 (or 141590 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The square root of 2061669644 is about 45405.6124724686. The cubic root of 2061669644 is about 1272.7399961876.

The spelling of 2061669644 in words is "two billion, sixty-one million, six hundred sixty-nine thousand, six hundred forty-four".