1285786883264 has 112 divisors (see below), whose sum is σ = 2893011821280. Its totient is φ = 562081628160.

The previous prime is 1285786883261. The next prime is 1285786883281. The reversal of 1285786883264 is 4623886875821.

It is a junction number, because it is equal to n+sod(n) for n = 1285786883194 and 1285786883203.

It is not an unprimeable number, because it can be changed into a prime (1285786883261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136592222 + ... + 136601634.

It is an arithmetic number, because the mean of its divisors is an integer number (25830462690).

Almost surely, 2^{1285786883264} 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 1285786883264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446505910640).

1285786883264 is an abundant number, since it is smaller than the sum of its proper divisors (1607224938016).

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

1285786883264 is a wasteful number, since it uses less digits than its factorization.

1285786883264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18098 (or 18088 counting only the distinct ones).

The product of its digits is 247726080, while the sum is 68.

The spelling of 1285786883264 in words is "one trillion, two hundred eighty-five billion, seven hundred eighty-six million, eight hundred eighty-three thousand, two hundred sixty-four".