7944287158 has 4 divisors (see below), whose sum is σ = 11916430740. Its totient is φ = 3972143578.

The previous prime is 7944287129. The next prime is 7944287171. The reversal of 7944287158 is 8517824497.

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

It is a super-2 number, since 2×7944287158² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7944287099 and 7944287108.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1986071788 + ... + 1986071791.

It is an arithmetic number, because the mean of its divisors is an integer number (2979107685).

Almost surely, 2^7944287158 is an apocalyptic number.

7944287158 is a deficient number, since it is larger than the sum of its proper divisors (3972143582).

7944287158 is a wasteful number, since it uses less digits than its factorization.

7944287158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3972143581.

The product of its digits is 4515840, while the sum is 55.

The square root of 7944287158 is about 89130.7307161789. The cubic root of 7944287158 is about 1995.3464437718.

The spelling of 7944287158 in words is "seven billion, nine hundred forty-four million, two hundred eighty-seven thousand, one hundred fifty-eight".