16520364378 has 96 divisors (see below), whose sum is σ = 43098531840. Its totient is φ = 4467739680.

The previous prime is 16520364331. The next prime is 16520364379. The reversal of 16520364378 is 87346302561.

16520364378 is a `hidden beast` number, since 1 + 6 + 5 + 203 + 6 + 437 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (16520364379) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3615051 + ... + 3619617.

It is an arithmetic number, because the mean of its divisors is an integer number (448943040).

Almost surely, 2^16520364378 is an apocalyptic number.

16520364378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16520364378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21549265920).

16520364378 is an abundant number, since it is smaller than the sum of its proper divisors (26578167462).

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

16520364378 is a wasteful number, since it uses less digits than its factorization.

16520364378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6112 (or 6109 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 16520364378 in words is "sixteen billion, five hundred twenty million, three hundred sixty-four thousand, three hundred seventy-eight".