205614655240 has 64 divisors (see below), whose sum is σ = 515628115200. Its totient is φ = 73333767168.

The previous prime is 205614655201. The next prime is 205614655271. The reversal of 205614655240 is 42556416502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 205614655193 and 205614655202.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7944304 + ... + 7970143.

It is an arithmetic number, because the mean of its divisors is an integer number (8056689300).

Almost surely, 2^205614655240 is an apocalyptic number.

205614655240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205614655240 is an abundant number, since it is smaller than the sum of its proper divisors (310013459960).

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

205614655240 is a wasteful number, since it uses less digits than its factorization.

205614655240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15914494 (or 15914490 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 205614655240 in words is "two hundred five billion, six hundred fourteen million, six hundred fifty-five thousand, two hundred forty".