243256942480 has 20 divisors (see below), whose sum is σ = 565572391452. Its totient is φ = 97302776960.

The previous prime is 243256942463. The next prime is 243256942493. The reversal of 243256942480 is 84249652342.

It can be written as a sum of positive squares in 2 ways, for example, as 159555509136 + 83701433344 = 399444^2 + 289312^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520355811 + ... + 1520355970.

Almost surely, 2^243256942480 is an apocalyptic number.

243256942480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243256942480 is an abundant number, since it is smaller than the sum of its proper divisors (322315448972).

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

243256942480 is a wasteful number, since it uses less digits than its factorization.

243256942480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3040711794 (or 3040711788 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 49.

The spelling of 243256942480 in words is "two hundred forty-three billion, two hundred fifty-six million, nine hundred forty-two thousand, four hundred eighty".