1299423454838 has 8 divisors (see below), whose sum is σ = 2063790193032. Its totient is φ = 611493390496.

The previous prime is 1299423454837. The next prime is 1299423454843. The reversal of 1299423454838 is 8384543249921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299423454837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19109168420 + ... + 19109168487.

It is an arithmetic number, because the mean of its divisors is an integer number (257973774129).

Almost surely, 2^{1299423454838} is an apocalyptic number.

1299423454838 is a deficient number, since it is larger than the sum of its proper divisors (764366738194).

1299423454838 is a wasteful number, since it uses less digits than its factorization.

1299423454838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38218336926.

The product of its digits is 59719680, while the sum is 62.

The spelling of 1299423454838 in words is "one trillion, two hundred ninety-nine billion, four hundred twenty-three million, four hundred fifty-four thousand, eight hundred thirty-eight".