7255447879680 has 3840 divisors, whose sum is σ = 36147086438400. Its totient is φ = 1331775406080.

The previous prime is 7255447879661. The next prime is 7255447879703. The reversal of 7255447879680 is 869787445527.

It is a happy number.

7255447879680 is a `hidden beast` number, since 7 + 2 + 5 + 5 + 4 + 478 + 79 + 6 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (3840).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 7255447879599 and 7255447879608.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 64207503304 + ... + 64207503416.

It is an arithmetic number, because the mean of its divisors is an integer number (9413303760).

Almost surely, 2^{7255447879680} is an apocalyptic number.

7255447879680 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 7255447879680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18073543219200).

7255447879680 is an abundant number, since it is smaller than the sum of its proper divisors (28891638558720).

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

7255447879680 is a wasteful number, since it uses less digits than its factorization.

7255447879680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 948326400, while the sum is 72.

The spelling of 7255447879680 in words is "seven trillion, two hundred fifty-five billion, four hundred forty-seven million, eight hundred seventy-nine thousand, six hundred eighty".