1226005978642 has 8 divisors (see below), whose sum is σ = 1847039575500. Its totient is φ = 610326120144.

The previous prime is 1226005978633. The next prime is 1226005978697. The reversal of 1226005978642 is 2468795006221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1162582089361 + 63423889281 = 1078231^2 + 251841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1226005978642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1338434017 + ... + 1338434932.

Almost surely, 2^{1226005978642} is an apocalyptic number.

1226005978642 is a deficient number, since it is larger than the sum of its proper divisors (621033596858).

1226005978642 is a wasteful number, since it uses less digits than its factorization.

1226005978642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2676869180.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 1226005978642 in words is "one trillion, two hundred twenty-six billion, five million, nine hundred seventy-eight thousand, six hundred forty-two".