243926963661 has 16 divisors (see below), whose sum is σ = 347304245760. Its totient is φ = 151945604160.

The previous prime is 243926963653. The next prime is 243926963701. The reversal of 243926963661 is 166369629342.

It is not a de Polignac number, because 243926963661 - 2³ = 243926963653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243926963641) 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, 45219210 + ... + 45224603.

It is an arithmetic number, because the mean of its divisors is an integer number (21706515360).

Almost surely, 2^243926963661 is an apocalyptic number.

It is an amenable number.

243926963661 is a deficient number, since it is larger than the sum of its proper divisors (103377282099).

243926963661 is a wasteful number, since it uses less digits than its factorization.

243926963661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90443876.

The product of its digits is 15116544, while the sum is 57.

The spelling of 243926963661 in words is "two hundred forty-three billion, nine hundred twenty-six million, nine hundred sixty-three thousand, six hundred sixty-one".