142780065808 has 10 divisors (see below), whose sum is σ = 276636377534. Its totient is φ = 71390032896.

The previous prime is 142780065803. The next prime is 142780065809. The reversal of 142780065808 is 808560087241.

It can be written as a sum of positive squares in only one way, i.e., 98086723344 + 44693342464 = 313188^2 + 211408^2 .

It is a super-2 number, since 2×142780065808² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (142780065803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4461877041 + ... + 4461877072.

Almost surely, 2^142780065808 is an apocalyptic number.

It is an amenable number.

142780065808 is a deficient number, since it is larger than the sum of its proper divisors (133856311726).

142780065808 is an equidigital number, since it uses as much as digits as its factorization.

142780065808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8923754121 (or 8923754115 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 49.

The spelling of 142780065808 in words is "one hundred forty-two billion, seven hundred eighty million, sixty-five thousand, eight hundred eight".