7291987648 has 56 divisors (see below), whose sum is σ = 16294754304. Its totient is φ = 3207609600.

The previous prime is 7291987607. The next prime is 7291987663. The reversal of 7291987648 is 8467891927.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145240 + ... + 188887.

Almost surely, 2^7291987648 is an apocalyptic number.

It is an amenable number.

7291987648 is an abundant number, since it is smaller than the sum of its proper divisors (9002766656).

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

7291987648 is a wasteful number, since it uses less digits than its factorization.

7291987648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334181 (or 334171 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 61.

The square root of 7291987648 is about 85393.1358365530. The cubic root of 7291987648 is about 1939.1674296159.

The spelling of 7291987648 in words is "seven billion, two hundred ninety-one million, nine hundred eighty-seven thousand, six hundred forty-eight".