243460591920 has 480 divisors, whose sum is σ = 1043581873152. Its totient is φ = 51367136256.

The previous prime is 243460591909. The next prime is 243460591961. The reversal of 243460591920 is 29195064342.

243460591920 is a `hidden beast` number, since 2 + 4 + 3 + 4 + 605 + 9 + 19 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1700229 + ... + 1837851.

Almost surely, 2^243460591920 is an apocalyptic number.

243460591920 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 243460591920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (521790936576).

243460591920 is an abundant number, since it is smaller than the sum of its proper divisors (800121281232).

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

243460591920 is a wasteful number, since it uses less digits than its factorization.

243460591920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137671 (or 137653 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 243460591920 in words is "two hundred forty-three billion, four hundred sixty million, five hundred ninety-one thousand, nine hundred twenty".