684634548144 has 80 divisors (see below), whose sum is σ = 1830668226560. Its totient is φ = 220247907840.

The previous prime is 684634548131. The next prime is 684634548151. The reversal of 684634548144 is 441845436486.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80749 + ... + 1172940.

It is an arithmetic number, because the mean of its divisors is an integer number (22883352832).

Almost surely, 2^684634548144 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 684634548144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (915334113280).

684634548144 is an abundant number, since it is smaller than the sum of its proper divisors (1146033678416).

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

684634548144 is a wasteful number, since it uses less digits than its factorization.

684634548144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254098 (or 1254092 counting only the distinct ones).

The product of its digits is 35389440, while the sum is 57.

The spelling of 684634548144 in words is "six hundred eighty-four billion, six hundred thirty-four million, five hundred forty-eight thousand, one hundred forty-four".