1683278513280 has 1536 divisors, whose sum is σ = 7710870988800. Its totient is φ = 343627038720.

The previous prime is 1683278513243. The next prime is 1683278513299. The reversal of 1683278513280 is 823158723861.

1683278513280 is a `hidden beast` number, since 1 + 6 + 8 + 32 + 78 + 513 + 28 + 0 = 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 191 ways as a sum of consecutive naturals, for example, 341225694 + ... + 341230626.

It is an arithmetic number, because the mean of its divisors is an integer number (5020098300).

Almost surely, 2^{1683278513280} is an apocalyptic number.

1683278513280 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 1683278513280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3855435494400).

1683278513280 is an abundant number, since it is smaller than the sum of its proper divisors (6027592475520).

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

1683278513280 is a wasteful number, since it uses less digits than its factorization.

1683278513280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5019 (or 4994 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 1683278513280 in words is "one trillion, six hundred eighty-three billion, two hundred seventy-eight million, five hundred thirteen thousand, two hundred eighty".