1273326335616 has 256 divisors, whose sum is σ = 3582339747840. Its totient is φ = 399919263744.

The previous prime is 1273326335591. The next prime is 1273326335623. The reversal of 1273326335616 is 6165336233721.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 269029186 + ... + 269033918.

It is an arithmetic number, because the mean of its divisors is an integer number (13993514640).

Almost surely, 2^{1273326335616} is an apocalyptic number.

1273326335616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1273326335616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1791169873920).

1273326335616 is an abundant number, since it is smaller than the sum of its proper divisors (2309013412224).

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

1273326335616 is a wasteful number, since it uses less digits than its factorization.

1273326335616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5223 (or 5211 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 48.

The spelling of 1273326335616 in words is "one trillion, two hundred seventy-three billion, three hundred twenty-six million, three hundred thirty-five thousand, six hundred sixteen".