243625652661 has 16 divisors (see below), whose sum is σ = 327138896448. Its totient is φ = 161267558400.

The previous prime is 243625652561. The next prime is 243625652681. The reversal of 243625652661 is 166256526342.

It is not a de Polignac number, because 243625652661 - 2¹¹ = 243625650613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243625652661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243625652681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1911 + ... + 698036.

It is an arithmetic number, because the mean of its divisors is an integer number (20446181028).

Almost surely, 2^243625652661 is an apocalyptic number.

It is an amenable number.

243625652661 is a deficient number, since it is larger than the sum of its proper divisors (83513243787).

243625652661 is a wasteful number, since it uses less digits than its factorization.

243625652661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700772.

The product of its digits is 3110400, while the sum is 48.

The spelling of 243625652661 in words is "two hundred forty-three billion, six hundred twenty-five million, six hundred fifty-two thousand, six hundred sixty-one".