3161685642 has 16 divisors (see below), whose sum is σ = 6341598432. Its totient is φ = 1050857360.

The previous prime is 3161685641. The next prime is 3161685643. The reversal of 3161685642 is 2465861613.

It is an interprime number because it is at equal distance from previous prime (3161685641) and next prime (3161685643).

It is a junction number, because it is equal to n+sod(n) for n = 3161685594 and 3161685603.

It is not an unprimeable number, because it can be changed into a prime (3161685641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 757209 + ... + 761372.

It is an arithmetic number, because the mean of its divisors is an integer number (396349902).

Almost surely, 2^3161685642 is an apocalyptic number.

3161685642 is an abundant number, since it is smaller than the sum of its proper divisors (3179912790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3161685642 is a wasteful number, since it uses less digits than its factorization.

3161685642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518933.

The product of its digits is 207360, while the sum is 42.

The square root of 3161685642 is about 56228.8684040502. The cubic root of 3161685642 is about 1467.7076650748.

The spelling of 3161685642 in words is "three billion, one hundred sixty-one million, six hundred eighty-five thousand, six hundred forty-two".