3178641961 has 4 divisors (see below), whose sum is σ = 3467609424. Its totient is φ = 2889674500.

The previous prime is 3178641941. The next prime is 3178641967. The reversal of 3178641961 is 1691468713.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3178641961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3178641967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144483715 + ... + 144483736.

It is an arithmetic number, because the mean of its divisors is an integer number (866902356).

Almost surely, 2^3178641961 is an apocalyptic number.

It is an amenable number.

3178641961 is a deficient number, since it is larger than the sum of its proper divisors (288967463).

3178641961 is a wasteful number, since it uses less digits than its factorization.

3178641961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288967462.

The product of its digits is 217728, while the sum is 46.

The square root of 3178641961 is about 56379.4462636873. The cubic root of 3178641961 is about 1470.3267913076.

The spelling of 3178641961 in words is "three billion, one hundred seventy-eight million, six hundred forty-one thousand, nine hundred sixty-one".