1691436944 has 40 divisors (see below), whose sum is σ = 3376920768. Its totient is φ = 820126080.

The previous prime is 1691436941. The next prime is 1691436953. The reversal of 1691436944 is 4496341961.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1691436941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179519 + ... + 188705.

Almost surely, 2^1691436944 is an apocalyptic number.

It is an amenable number.

1691436944 is a deficient number, since it is larger than the sum of its proper divisors (1685483824).

1691436944 is a wasteful number, since it uses less digits than its factorization.

1691436944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9543 (or 9537 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The square root of 1691436944 is about 41127.0828530301. The cubic root of 1691436944 is about 1191.4759230937.

The spelling of 1691436944 in words is "one billion, six hundred ninety-one million, four hundred thirty-six thousand, nine hundred forty-four".