243396474077808 has 320 divisors, whose sum is σ = 748106975232000. Its totient is φ = 75617193931776.

The previous prime is 243396474077777. The next prime is 243396474077903. The reversal of 243396474077808 is 808770474693342.

243396474077808 is a `hidden beast` number, since 2 + 4 + 3 + 3 + 9 + 6 + 474 + 0 + 77 + 80 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 56801803 + ... + 60936341.

It is an arithmetic number, because the mean of its divisors is an integer number (2337834297600).

Almost surely, 2^{243396474077808} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243396474077808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374053487616000).

243396474077808 is an abundant number, since it is smaller than the sum of its proper divisors (504710501154192).

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

243396474077808 is a wasteful number, since it uses less digits than its factorization.

243396474077808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4134749 (or 4134737 counting only the distinct ones).

The product of its (nonzero) digits is 1365590016, while the sum is 72.

The spelling of 243396474077808 in words is "two hundred forty-three trillion, three hundred ninety-six billion, four hundred seventy-four million, seventy-seven thousand, eight hundred eight".