243724064525 has 12 divisors (see below), whose sum is σ = 303537575700. Its totient is φ = 194127809280.

The previous prime is 243724064503. The next prime is 243724064653. The reversal of 243724064525 is 525460427342.

It can be written as a sum of positive squares in 6 ways, for example, as 159112996 + 243564951529 = 12614^2 + 493523^2 .

It is a de Polignac number, because none of the positive numbers 2^k-243724064525 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21280220 + ... + 21291669.

It is an arithmetic number, because the mean of its divisors is an integer number (25294797975).

Almost surely, 2^243724064525 is an apocalyptic number.

243724064525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243724064525 is a deficient number, since it is larger than the sum of its proper divisors (59813511175).

243724064525 is a wasteful number, since it uses less digits than its factorization.

243724064525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42572128 (or 42572123 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 44.

The spelling of 243724064525 in words is "two hundred forty-three billion, seven hundred twenty-four million, sixty-four thousand, five hundred twenty-five".