1278048173388 has 384 divisors, whose sum is σ = 3644733259776. Its totient is φ = 340962048000.

The previous prime is 1278048173377. The next prime is 1278048173393. The reversal of 1278048173388 is 8833718408721.

It is a super-2 number, since 2×1278048173388² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2443686495 + ... + 2443687017.

It is an arithmetic number, because the mean of its divisors is an integer number (9491492864).

Almost surely, 2^{1278048173388} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278048173388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1822366629888).

1278048173388 is an abundant number, since it is smaller than the sum of its proper divisors (2366685086388).

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

1278048173388 is a wasteful number, since it uses less digits than its factorization.

1278048173388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893 (or 891 counting only the distinct ones).

The product of its (nonzero) digits is 14450688, while the sum is 60.

The spelling of 1278048173388 in words is "one trillion, two hundred seventy-eight billion, forty-eight million, one hundred seventy-three thousand, three hundred eighty-eight".