7216720278 has 16 divisors (see below), whose sum is σ = 14823534000. Its totient is φ = 2340557856.

The previous prime is 7216720219. The next prime is 7216720283. The reversal of 7216720278 is 8720276127.

It is a Curzon number.

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 in 7 ways as a sum of consecutive naturals, for example, 16253653 + ... + 16254096.

It is an arithmetic number, because the mean of its divisors is an integer number (926470875).

Almost surely, 2^7216720278 is an apocalyptic number.

7216720278 is an abundant number, since it is smaller than the sum of its proper divisors (7606813722).

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

7216720278 is a wasteful number, since it uses less digits than its factorization.

7216720278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32507791.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 7216720278 is about 84951.2817913891. The cubic root of 7216720278 is about 1932.4723590940.

The spelling of 7216720278 in words is "seven billion, two hundred sixteen million, seven hundred twenty thousand, two hundred seventy-eight".