4278777678 has 48 divisors (see below), whose sum is σ = 10601267040. Its totient is φ = 1221792768.

The previous prime is 4278777649. The next prime is 4278777683. The reversal of 4278777678 is 8767778724.

4278777678 is a `hidden beast` number, since 427 + 8 + 77 + 76 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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, 229026 + ... + 247002.

It is an arithmetic number, because the mean of its divisors is an integer number (220859730).

Almost surely, 2^4278777678 is an apocalyptic number.

4278777678 is an abundant number, since it is smaller than the sum of its proper divisors (6322489362).

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

4278777678 is a wasteful number, since it uses less digits than its factorization.

4278777678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19881 (or 19878 counting only the distinct ones).

The product of its digits is 51631104, while the sum is 63.

The square root of 4278777678 is about 65412.3663996343. The cubic root of 4278777678 is about 1623.4536994526.

The spelling of 4278777678 in words is "four billion, two hundred seventy-eight million, seven hundred seventy-seven thousand, six hundred seventy-eight".