205145553051 has 6 divisors (see below), whose sum is σ = 296321354420. Its totient is φ = 136763702028.

The previous prime is 205145553043. The next prime is 205145553061. The reversal of 205145553051 is 150355541502.

205145553051 is a `hidden beast` number, since 2 + 0 + 51 + 4 + 5 + 553 + 0 + 51 = 666.

It is not a de Polignac number, because 205145553051 - 2³ = 205145553043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205145552997 and 205145553015.

It is not an unprimeable number, because it can be changed into a prime (205145553031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11396975161 + ... + 11396975178.

Almost surely, 2^205145553051 is an apocalyptic number.

205145553051 is a deficient number, since it is larger than the sum of its proper divisors (91175801369).

205145553051 is a wasteful number, since it uses less digits than its factorization.

205145553051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22793950345 (or 22793950342 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 205145553051 in words is "two hundred five billion, one hundred forty-five million, five hundred fifty-three thousand, fifty-one".