243145570644 has 72 divisors (see below), whose sum is σ = 616137526368. Its totient is φ = 80848342080.

The previous prime is 243145570637. The next prime is 243145570649. The reversal of 243145570644 is 446075541342.

243145570644 is a `hidden beast` number, since 2 + 4 + 3 + 14 + 5 + 570 + 64 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 243145570644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243145570649) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44149339 + ... + 44154845.

It is an arithmetic number, because the mean of its divisors is an integer number (8557465644).

Almost surely, 2^243145570644 is an apocalyptic number.

It is an amenable number.

243145570644 is an abundant number, since it is smaller than the sum of its proper divisors (372991955724).

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

243145570644 is a wasteful number, since it uses less digits than its factorization.

243145570644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325 (or 8320 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 45.

The spelling of 243145570644 in words is "two hundred forty-three billion, one hundred forty-five million, five hundred seventy thousand, six hundred forty-four".