78305005278 has 48 divisors (see below), whose sum is σ = 174288772320. Its totient is φ = 25390024128.

The previous prime is 78305005267. The next prime is 78305005283. The reversal of 78305005278 is 87250050387.

78305005278 is a `hidden beast` number, since 78 + 3 + 0 + 50 + 0 + 527 + 8 = 666.

It is a super-2 number, since 2×78305005278² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3289503 + ... + 3313221.

It is an arithmetic number, because the mean of its divisors is an integer number (3631016090).

Almost surely, 2^78305005278 is an apocalyptic number.

78305005278 is an abundant number, since it is smaller than the sum of its proper divisors (95983767042).

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

78305005278 is a wasteful number, since it uses less digits than its factorization.

78305005278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28721 (or 28718 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The spelling of 78305005278 in words is "seventy-eight billion, three hundred five million, five thousand, two hundred seventy-eight".