1299423454836 has 48 divisors (see below), whose sum is σ = 3344857389888. Its totient is φ = 390070828800.

The previous prime is 1299423454811. The next prime is 1299423454837. The reversal of 1299423454836 is 6384543249921.

It is a happy number.

It is a super-2 number, since 2×1299423454836² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1299423454836.

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 15 ways as a sum of consecutive naturals, for example, 101574550 + ... + 101587341.

It is an arithmetic number, because the mean of its divisors is an integer number (69684528956).

Almost surely, 2^{1299423454836} is an apocalyptic number.

It is an amenable number.

1299423454836 is an abundant number, since it is smaller than the sum of its proper divisors (2045433935052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1299423454836 is a wasteful number, since it uses less digits than its factorization.

1299423454836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203161952 (or 203161950 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 60.

The spelling of 1299423454836 in words is "one trillion, two hundred ninety-nine billion, four hundred twenty-three million, four hundred fifty-four thousand, eight hundred thirty-six".