1243663499342 has 8 divisors (see below), whose sum is σ = 2035085726232. Its totient is φ = 565301590600.

The previous prime is 1243663499269. The next prime is 1243663499347. The reversal of 1243663499342 is 2439943663421.

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 (1243663499347) 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, 28265079509 + ... + 28265079552.

It is an arithmetic number, because the mean of its divisors is an integer number (254385715779).

Almost surely, 2^{1243663499342} is an apocalyptic number.

1243663499342 is a deficient number, since it is larger than the sum of its proper divisors (791422226890).

1243663499342 is a wasteful number, since it uses less digits than its factorization.

1243663499342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56530159074.

The product of its digits is 20155392, while the sum is 56.

The spelling of 1243663499342 in words is "one trillion, two hundred forty-three billion, six hundred sixty-three million, four hundred ninety-nine thousand, three hundred forty-two".