3158157946 has 4 divisors (see below), whose sum is σ = 4737236922. Its totient is φ = 1579078972.

The previous prime is 3158157943. The next prime is 3158157967. The reversal of 3158157946 is 6497518513.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2276721225 + 881436721 = 47715^2 + 29689^2 .

It is a super-2 number, since 2×3158157946² = 19947923223765877832, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3158157946.

It is not an unprimeable number, because it can be changed into a prime (3158157943) 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 as a sum of consecutive naturals, namely, 789539485 + ... + 789539488.

Almost surely, 2^3158157946 is an apocalyptic number.

3158157946 is a deficient number, since it is larger than the sum of its proper divisors (1579078976).

3158157946 is a wasteful number, since it uses less digits than its factorization.

3158157946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579078975.

The product of its digits is 907200, while the sum is 49.

The square root of 3158157946 is about 56197.4905667504. The cubic root of 3158157946 is about 1467.1615899838.

It can be divided in two parts, 315815 and 7946, that added together give a square (323761 = 569²).

The spelling of 3158157946 in words is "three billion, one hundred fifty-eight million, one hundred fifty-seven thousand, nine hundred forty-six".