213777209720 has 64 divisors (see below), whose sum is σ = 486389836800. Its totient is φ = 84554035200.

The previous prime is 213777209699. The next prime is 213777209743. The reversal of 213777209720 is 27902777312.

213777209720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4441946 + ... + 4489814.

It is an arithmetic number, because the mean of its divisors is an integer number (7599841200).

Almost surely, 2^213777209720 is an apocalyptic number.

213777209720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213777209720 is an abundant number, since it is smaller than the sum of its proper divisors (272612627080).

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

213777209720 is a wasteful number, since it uses less digits than its factorization.

213777209720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49128 (or 49124 counting only the distinct ones).

The product of its (nonzero) digits is 518616, while the sum is 47.

The spelling of 213777209720 in words is "two hundred thirteen billion, seven hundred seventy-seven million, two hundred nine thousand, seven hundred twenty".