205128511250874 has 8 divisors (see below), whose sum is σ = 410257022501760. Its totient is φ = 68376170416956.

The previous prime is 205128511250843. The next prime is 205128511250933. The reversal of 205128511250874 is 478052115821502.

It is a sphenic number, since it is the product of 3 distinct primes.

205128511250874 is an admirable number.

It is a super-2 number, since 2×205128511250874² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17094042604234 + ... + 17094042604245.

It is an arithmetic number, because the mean of its divisors is an integer number (51282127812720).

Almost surely, 2^{205128511250874} is an apocalyptic number.

205128511250874 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205128511250874 is a wasteful number, since it uses less digits than its factorization.

205128511250874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34188085208484.

The product of its (nonzero) digits is 1792000, while the sum is 51.

The spelling of 205128511250874 in words is "two hundred five trillion, one hundred twenty-eight billion, five hundred eleven million, two hundred fifty thousand, eight hundred seventy-four".