1691045168 has 10 divisors (see below), whose sum is σ = 3276400044. Its totient is φ = 845522576.

The previous prime is 1691045143. The next prime is 1691045203. The reversal of 1691045168 is 8615401961.

It is a super-2 number, since 2×1691045168² = 5719267520432296448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52845146 + ... + 52845177.

Almost surely, 2^1691045168 is an apocalyptic number.

It is an amenable number.

1691045168 is a deficient number, since it is larger than the sum of its proper divisors (1585354876).

1691045168 is a wasteful number, since it uses less digits than its factorization.

1691045168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105690331 (or 105690325 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 1691045168 is about 41122.3195843814. The cubic root of 1691045168 is about 1191.3839248439.

The spelling of 1691045168 in words is "one billion, six hundred ninety-one million, forty-five thousand, one hundred sixty-eight".