243775307564 has 6 divisors (see below), whose sum is σ = 426606788244. Its totient is φ = 121887653780.

The previous prime is 243775307551. The next prime is 243775307603. The reversal of 243775307564 is 465703577342.

It is a super-2 number, since 2×243775307564² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30471913442 + ... + 30471913449.

It is an arithmetic number, because the mean of its divisors is an integer number (71101131374).

Almost surely, 2^243775307564 is an apocalyptic number.

It is an amenable number.

243775307564 is a deficient number, since it is larger than the sum of its proper divisors (182831480680).

243775307564 is a wasteful number, since it uses less digits than its factorization.

243775307564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60943826895 (or 60943826893 counting only the distinct ones).

The product of its (nonzero) digits is 14817600, while the sum is 53.

The spelling of 243775307564 in words is "two hundred forty-three billion, seven hundred seventy-five million, three hundred seven thousand, five hundred sixty-four".