1276120478880 has 384 divisors, whose sum is σ = 4813704806400. Its totient is φ = 313879560192.

The previous prime is 1276120478873. The next prime is 1276120478903. The reversal of 1276120478880 is 888740216721.

1276120478880 is a `hidden beast` number, since 1 + 2 + 76 + 1 + 20 + 478 + 8 + 80 = 666.

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

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, 79121377 + ... + 79137503.

It is an arithmetic number, because the mean of its divisors is an integer number (12535689600).

Almost surely, 2^{1276120478880} is an apocalyptic number.

1276120478880 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 1276120478880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2406852403200).

1276120478880 is an abundant number, since it is smaller than the sum of its proper divisors (3537584327520).

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

1276120478880 is a wasteful number, since it uses less digits than its factorization.

1276120478880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17573 (or 17559 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 54.

The spelling of 1276120478880 in words is "one trillion, two hundred seventy-six billion, one hundred twenty million, four hundred seventy-eight thousand, eight hundred eighty".