1786904944864 has 96 divisors (see below), whose sum is σ = 3805146132480. Its totient is φ = 821123827200.

The previous prime is 1786904944861. The next prime is 1786904944873. The reversal of 1786904944864 is 4684494096871.

It is a junction number, because it is equal to n+sod(n) for n = 1786904944793 and 1786904944802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1786904944861) 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, 198298119 + ... + 198307129.

It is an arithmetic number, because the mean of its divisors is an integer number (39636938880).

Almost surely, 2^{1786904944864} 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 1786904944864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1902573066240).

1786904944864 is an abundant number, since it is smaller than the sum of its proper divisors (2018241187616).

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

1786904944864 is a wasteful number, since it uses less digits than its factorization.

1786904944864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11064 (or 11056 counting only the distinct ones).

The product of its (nonzero) digits is 334430208, while the sum is 70.

The spelling of 1786904944864 in words is "one trillion, seven hundred eighty-six billion, nine hundred four million, nine hundred forty-four thousand, eight hundred sixty-four".