1285356846320 has 40 divisors (see below), whose sum is σ = 2989715528400. Its totient is φ = 513925816320.

The previous prime is 1285356846287. The next prime is 1285356846343. The reversal of 1285356846320 is 236486535821.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3198545 + ... + 3577904.

It is an arithmetic number, because the mean of its divisors is an integer number (74742888210).

Almost surely, 2^{1285356846320} is an apocalyptic number.

1285356846320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1285356846320 is an abundant number, since it is smaller than the sum of its proper divisors (1704358682080).

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

1285356846320 is a wasteful number, since it uses less digits than its factorization.

1285356846320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6778833 (or 6778827 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 53.

The spelling of 1285356846320 in words is "one trillion, two hundred eighty-five billion, three hundred fifty-six million, eight hundred forty-six thousand, three hundred twenty".