7961218472 has 8 divisors (see below), whose sum is σ = 14927284650. Its totient is φ = 3980609232.

The previous prime is 7961218411. The next prime is 7961218483. The reversal of 7961218472 is 2748121697.

It can be written as a sum of positive squares in only one way, i.e., 5767794916 + 2193423556 = 75946^2 + 46834^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 497576147 + ... + 497576162.

Almost surely, 2^7961218472 is an apocalyptic number.

It is an amenable number.

7961218472 is a deficient number, since it is larger than the sum of its proper divisors (6966066178).

7961218472 is a wasteful number, since it uses less digits than its factorization.

7961218472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995152315 (or 995152311 counting only the distinct ones).

The product of its digits is 338688, while the sum is 47.

The square root of 7961218472 is about 89225.6603898228. The cubic root of 7961218472 is about 1996.7629696438.

The spelling of 7961218472 in words is "seven billion, nine hundred sixty-one million, two hundred eighteen thousand, four hundred seventy-two".