1242837649838 has 8 divisors (see below), whose sum is σ = 1865194707432. Its totient is φ = 621106080696.

The previous prime is 1242837649813. The next prime is 1242837649841. The reversal of 1242837649838 is 8389467382421.

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

It is a Curzon number.

It is a congruent number.

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, 156367145 + ... + 156375092.

It is an arithmetic number, because the mean of its divisors is an integer number (233149338429).

Almost surely, 2^{1242837649838} is an apocalyptic number.

1242837649838 is a deficient number, since it is larger than the sum of its proper divisors (622357057594).

1242837649838 is a wasteful number, since it uses less digits than its factorization.

1242837649838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312744226.

The product of its digits is 111476736, while the sum is 65.

The spelling of 1242837649838 in words is "one trillion, two hundred forty-two billion, eight hundred thirty-seven million, six hundred forty-nine thousand, eight hundred thirty-eight".