3156855978 has 8 divisors (see below), whose sum is σ = 6313711968. Its totient is φ = 1052285324.

The previous prime is 3156855973. The next prime is 3156855983. The reversal of 3156855978 is 8795586513.

It is a happy number.

3156855978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3156855973) and next prime (3156855983).

It is a sphenic number, since it is the product of 3 distinct primes.

3156855978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (3156855971) 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, 263071326 + ... + 263071337.

It is an arithmetic number, because the mean of its divisors is an integer number (789213996).

Almost surely, 2^3156855978 is an apocalyptic number.

3156855978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3156855978 is a wasteful number, since it uses less digits than its factorization.

3156855978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526142668.

The product of its digits is 9072000, while the sum is 57.

The square root of 3156855978 is about 56185.9055101900. The cubic root of 3156855978 is about 1466.9599471242.

The spelling of 3156855978 in words is "three billion, one hundred fifty-six million, eight hundred fifty-five thousand, nine hundred seventy-eight".