243820785372 has 24 divisors (see below), whose sum is σ = 584291252496. Its totient is φ = 79077011328.

The previous prime is 243820785367. The next prime is 243820785379. The reversal of 243820785372 is 273587028342.

It is a super-3 number, since 3×243820785372³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243820785379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274572513 + ... + 274573400.

It is an arithmetic number, because the mean of its divisors is an integer number (24345468854).

Almost surely, 2^243820785372 is an apocalyptic number.

It is an amenable number.

243820785372 is an abundant number, since it is smaller than the sum of its proper divisors (340470467124).

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

243820785372 is a wasteful number, since it uses less digits than its factorization.

243820785372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549145957 (or 549145955 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 51.

The spelling of 243820785372 in words is "two hundred forty-three billion, eight hundred twenty million, seven hundred eighty-five thousand, three hundred seventy-two".