7278951680 has 864 divisors, whose sum is σ = 25854474240. Its totient is φ = 1897758720.

The previous prime is 7278951677. The next prime is 7278951707. The reversal of 7278951680 is 861598727.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 316476149 + ... + 316476171.

It is an arithmetic number, because the mean of its divisors is an integer number (29924160).

Almost surely, 2^7278951680 is an apocalyptic number.

7278951680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7278951680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12927237120).

7278951680 is an abundant number, since it is smaller than the sum of its proper divisors (18575522560).

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

7278951680 is a wasteful number, since it uses less digits than its factorization.

7278951680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 80 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 53.

The square root of 7278951680 is about 85316.7725596790. The cubic root of 7278951680 is about 1938.0111832185.

The spelling of 7278951680 in words is "seven billion, two hundred seventy-eight million, nine hundred fifty-one thousand, six hundred eighty".