1276242836400 has 1200 divisors, whose sum is σ = 5532370905600. Its totient is φ = 275248005120.

The previous prime is 1276242836383. The next prime is 1276242836411. The reversal of 1276242836400 is 46382426721.

It is a happy number.

1276242836400 is a `hidden beast` number, since 1 + 276 + 242 + 83 + 64 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1200).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 1521147181 + ... + 1521148019.

It is an arithmetic number, because the mean of its divisors is an integer number (4610309088).

Almost surely, 2^{1276242836400} is an apocalyptic number.

1276242836400 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 1276242836400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2766185452800).

1276242836400 is an abundant number, since it is smaller than the sum of its proper divisors (4256128069200).

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

1276242836400 is a wasteful number, since it uses less digits than its factorization.

1276242836400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 1276242836400 in words is "one trillion, two hundred seventy-six billion, two hundred forty-two million, eight hundred thirty-six thousand, four hundred".