205648143480 has 288 divisors, whose sum is σ = 747076037760. Its totient is φ = 48987694080.

The previous prime is 205648143479. The next prime is 205648143499. The reversal of 205648143480 is 84341846502.

205648143480 is a `hidden beast` number, since 2 + 0 + 5 + 64 + 81 + 434 + 80 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1831522 + ... + 1940558.

It is an arithmetic number, because the mean of its divisors is an integer number (2594014020).

Almost surely, 2^205648143480 is an apocalyptic number.

205648143480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205648143480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373538018880).

205648143480 is an abundant number, since it is smaller than the sum of its proper divisors (541427894280).

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

205648143480 is a wasteful number, since it uses less digits than its factorization.

205648143480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109111 (or 109091 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

Adding to 205648143480 its reverse (84341846502), we get a palindrome (289989989982).

The spelling of 205648143480 in words is "two hundred five billion, six hundred forty-eight million, one hundred forty-three thousand, four hundred eighty".