213737784680 has 128 divisors (see below), whose sum is σ = 585710714880. Its totient is φ = 68603884800.

The previous prime is 213737784661. The next prime is 213737784697. The reversal of 213737784680 is 86487737312.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50396 + ... + 655755.

It is an arithmetic number, because the mean of its divisors is an integer number (4575864960).

Almost surely, 2^213737784680 is an apocalyptic number.

213737784680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213737784680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292855357440).

213737784680 is an abundant number, since it is smaller than the sum of its proper divisors (371972930200).

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

213737784680 is a wasteful number, since it uses less digits than its factorization.

213737784680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706239 (or 706235 counting only the distinct ones).

The product of its (nonzero) digits is 9483264, while the sum is 56.

The spelling of 213737784680 in words is "two hundred thirteen billion, seven hundred thirty-seven million, seven hundred eighty-four thousand, six hundred eighty".