1600681491 has 24 divisors (see below), whose sum is σ = 2384279040. Its totient is φ = 1034248176.

The previous prime is 1600681441. The next prime is 1600681501. The reversal of 1600681491 is 1941860061.

It is a happy number.

1600681491 is a `hidden beast` number, since 1 + 600 + 6 + 8 + 1 + 49 + 1 = 666.

It is not a de Polignac number, because 1600681491 - 2¹⁸ = 1600419347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1600681441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25200 + ... + 61938.

It is an arithmetic number, because the mean of its divisors is an integer number (99344960).

Almost surely, 2^1600681491 is an apocalyptic number.

1600681491 is a deficient number, since it is larger than the sum of its proper divisors (783597549).

1600681491 is a wasteful number, since it uses less digits than its factorization.

1600681491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36895 (or 36892 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1600681491 is about 40008.5177306033. The cubic root of 1600681491 is about 1169.7731293620.

The spelling of 1600681491 in words is "one billion, six hundred million, six hundred eighty-one thousand, four hundred ninety-one".