1243162319691 has 8 divisors (see below), whose sum is σ = 1657705983120. Its totient is φ = 828696768032.

The previous prime is 1243162319647. The next prime is 1243162319701. The reversal of 1243162319691 is 1969132613421.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1243162319691 - 2⁶ = 1243162319627 is a prime.

It is a super-4 number, since 4×1243162319691⁴ (a number of 49 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1243162319691.

It is not an unprimeable number, because it can be changed into a prime (1243162319621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19490796 + ... + 19554473.

It is an arithmetic number, because the mean of its divisors is an integer number (207213247890).

Almost surely, 2^{1243162319691} is an apocalyptic number.

1243162319691 is a deficient number, since it is larger than the sum of its proper divisors (414543663429).

1243162319691 is a wasteful number, since it uses less digits than its factorization.

1243162319691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39055885.

The product of its digits is 419904, while the sum is 48.

The spelling of 1243162319691 in words is "one trillion, two hundred forty-three billion, one hundred sixty-two million, three hundred nineteen thousand, six hundred ninety-one".