1276663420368 has 320 divisors, whose sum is σ = 4210658833920. Its totient is φ = 362793074688.

The previous prime is 1276663420321. The next prime is 1276663420387. The reversal of 1276663420368 is 8630243666721.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 487833396 + ... + 487836012.

It is an arithmetic number, because the mean of its divisors is an integer number (13158308856).

Almost surely, 2^{1276663420368} is an apocalyptic number.

1276663420368 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 1276663420368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105329416960).

1276663420368 is an abundant number, since it is smaller than the sum of its proper divisors (2933995413552).

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

1276663420368 is a wasteful number, since it uses less digits than its factorization.

1276663420368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451 (or 3439 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 54.

The spelling of 1276663420368 in words is "one trillion, two hundred seventy-six billion, six hundred sixty-three million, four hundred twenty thousand, three hundred sixty-eight".