205424432613 has 16 divisors (see below), whose sum is σ = 304639628800. Its totient is φ = 136811410560.

The previous prime is 205424432611. The next prime is 205424432621. The reversal of 205424432613 is 316234424502.

205424432613 is a `hidden beast` number, since 2 + 0 + 5 + 4 + 2 + 4 + 4 + 32 + 613 = 666.

It is not a de Polignac number, because 205424432613 - 2¹ = 205424432611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205424432611) 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, 3811948 + ... + 3865461.

It is an arithmetic number, because the mean of its divisors is an integer number (19039976800).

Almost surely, 2^205424432613 is an apocalyptic number.

It is an amenable number.

205424432613 is a deficient number, since it is larger than the sum of its proper divisors (99215196187).

205424432613 is an equidigital number, since it uses as much as digits as its factorization.

205424432613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7678409 (or 7678403 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 205424432613 in words is "two hundred five billion, four hundred twenty-four million, four hundred thirty-two thousand, six hundred thirteen".