7280646864 has 20 divisors (see below), whose sum is σ = 18808337856. Its totient is φ = 2426882272.

The previous prime is 7280646859. The next prime is 7280646889. The reversal of 7280646864 is 4686460827.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 75840024 + ... + 75840119.

Almost surely, 2^7280646864 is an apocalyptic number.

It is an amenable number.

7280646864 is an abundant number, since it is smaller than the sum of its proper divisors (11527690992).

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

7280646864 is a wasteful number, since it uses less digits than its factorization.

7280646864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151680154 (or 151680148 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The square root of 7280646864 is about 85326.7066281126. The cubic root of 7280646864 is about 1938.1616183678.

The spelling of 7280646864 in words is "seven billion, two hundred eighty million, six hundred forty-six thousand, eight hundred sixty-four".