142447696286778 has 16 divisors (see below), whose sum is σ = 316550436192960. Its totient is φ = 47482565428908.

The previous prime is 142447696286759. The next prime is 142447696286803. The reversal of 142447696286778 is 877682696744241.

142447696286778 is a `hidden beast` number, since 1 + 4 + 2 + 4 + 476 + 9 + 62 + 86 + 7 + 7 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 142447696286697 and 142447696286706.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1318960150750 + ... + 1318960150857.

It is an arithmetic number, because the mean of its divisors is an integer number (19784402262060).

Almost surely, 2^{142447696286778} is an apocalyptic number.

142447696286778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

142447696286778 is an abundant number, since it is smaller than the sum of its proper divisors (174102739906182).

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

142447696286778 is a wasteful number, since it uses less digits than its factorization.

142447696286778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2637920301618 (or 2637920301612 counting only the distinct ones).

The product of its digits is 10924720128, while the sum is 81.

The spelling of 142447696286778 in words is "one hundred forty-two trillion, four hundred forty-seven billion, six hundred ninety-six million, two hundred eighty-six thousand, seven hundred seventy-eight".