205311470364540 has 48 divisors (see below), whose sum is σ = 638746796691360. Its totient is φ = 54749725430400.

The previous prime is 205311470364523. The next prime is 205311470364547. The reversal of 205311470364540 is 45463074113502.

205311470364540 is a `hidden beast` number, since 2 + 0 + 5 + 3 + 1 + 1 + 4 + 70 + 36 + 4 + 540 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205311470364547) 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, 190103212761 + ... + 190103213840.

It is an arithmetic number, because the mean of its divisors is an integer number (13307224931070).

Almost surely, 2^{205311470364540} is an apocalyptic number.

205311470364540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205311470364540 is an abundant number, since it is smaller than the sum of its proper divisors (433435326326820).

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

205311470364540 is a wasteful number, since it uses less digits than its factorization.

205311470364540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380206426619 (or 380206426611 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 205311470364540 in words is "two hundred five trillion, three hundred eleven billion, four hundred seventy million, three hundred sixty-four thousand, five hundred forty".