243213416778 has 16 divisors (see below), whose sum is σ = 486452113056. Its totient is φ = 81066925680.

The previous prime is 243213416767. The next prime is 243213416783. The reversal of 243213416778 is 877614312342.

It is a super-2 number, since 2×243213416778² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927076 + ... + 1160127.

It is an arithmetic number, because the mean of its divisors is an integer number (30403257066).

Almost surely, 2^243213416778 is an apocalyptic number.

243213416778 is an abundant number, since it is smaller than the sum of its proper divisors (243238696278).

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

243213416778 is a wasteful number, since it uses less digits than its factorization.

243213416778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106629.

The product of its digits is 1354752, while the sum is 48.

The spelling of 243213416778 in words is "two hundred forty-three billion, two hundred thirteen million, four hundred sixteen thousand, seven hundred seventy-eight".