78847278480 has 60 divisors (see below), whose sum is σ = 264795445980. Its totient is φ = 21025940736.

The previous prime is 78847278469. The next prime is 78847278481. The reversal of 78847278480 is 8487274887.

78847278480 is a `hidden beast` number, since 7 + 8 + 8 + 472 + 7 + 84 + 80 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30221736336 + 48625542144 = 173844^2 + 220512^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×78847278480² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78847278481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54754335 + ... + 54755774.

It is an arithmetic number, because the mean of its divisors is an integer number (4413257433).

Almost surely, 2^78847278480 is an apocalyptic number.

It is an amenable number.

78847278480 is an abundant number, since it is smaller than the sum of its proper divisors (185948167500).

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

78847278480 is a wasteful number, since it uses less digits than its factorization.

78847278480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109510128 (or 109510119 counting only the distinct ones).

The product of its (nonzero) digits is 44957696, while the sum is 63.

The spelling of 78847278480 in words is "seventy-eight billion, eight hundred forty-seven million, two hundred seventy-eight thousand, four hundred eighty".