1273326297600 has 960 divisors, whose sum is σ = 4952951562240. Its totient is φ = 282363494400.

The previous prime is 1273326297577. The next prime is 1273326297619. The reversal of 1273326297600 is 67926233721.

It is a tau number, because it is divible by the number of its divisors (960).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1273326297600.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1295346709 + ... + 1295347691.

It is an arithmetic number, because the mean of its divisors is an integer number (5159324544).

Almost surely, 2^{1273326297600} is an apocalyptic number.

1273326297600 is a gapful number since it is divisible by the number (10) 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 1273326297600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2476475781120).

1273326297600 is an abundant number, since it is smaller than the sum of its proper divisors (3679625264640).

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

1273326297600 is an equidigital number, since it uses as much as digits as its factorization.

1273326297600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1161 (or 1140 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 48.

The spelling of 1273326297600 in words is "one trillion, two hundred seventy-three billion, three hundred twenty-six million, two hundred ninety-seven thousand, six hundred".