142246981988 has 24 divisors (see below), whose sum is σ = 249594911160. Its totient is φ = 70934227200.

The previous prime is 142246981969. The next prime is 142246981991. The reversal of 142246981988 is 889189642241.

It can be written as a sum of positive squares in 4 ways, for example, as 68823324964 + 73423657024 = 262342^2 + 270968^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 142246981988.

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, 13247870 + ... + 13258602.

It is an arithmetic number, because the mean of its divisors is an integer number (10399787965).

Almost surely, 2^142246981988 is an apocalyptic number.

It is an amenable number.

142246981988 is a deficient number, since it is larger than the sum of its proper divisors (107347929172).

142246981988 is a wasteful number, since it uses less digits than its factorization.

142246981988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19247 (or 19245 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 62.

The spelling of 142246981988 in words is "one hundred forty-two billion, two hundred forty-six million, nine hundred eighty-one thousand, nine hundred eighty-eight".