1276545204648 has 256 divisors, whose sum is σ = 4203034560000. Its totient is φ = 358746796800.

The previous prime is 1276545204563. The next prime is 1276545204667. The reversal of 1276545204648 is 8464025456721.

1276545204648 is a `hidden beast` number, since 1 + 2 + 7 + 6 + 54 + 520 + 4 + 64 + 8 = 666.

It is a Cunningham number, because it is equal to 1129843²-1.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 1276545204594 and 1276545204603.

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 63 ways as a sum of consecutive naturals, for example, 4378138 + ... + 4660598.

It is an arithmetic number, because the mean of its divisors is an integer number (16418103750).

Almost surely, 2^{1276545204648} is an apocalyptic number.

1276545204648 is a gapful number since it is divisible by the number (18) 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 1276545204648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2101517280000).

1276545204648 is an abundant number, since it is smaller than the sum of its proper divisors (2926489355352).

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

1276545204648 is a wasteful number, since it uses less digits than its factorization.

1276545204648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282558 (or 282534 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 54.

The spelling of 1276545204648 in words is "one trillion, two hundred seventy-six billion, five hundred forty-five million, two hundred four thousand, six hundred forty-eight".