205035357840 has 80 divisors (see below), whose sum is σ = 636277275648. Its totient is φ = 54618661888.

The previous prime is 205035357827. The next prime is 205035357841. The reversal of 205035357840 is 48753530502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 205035357792 and 205035357801.

It is not an unprimeable number, because it can be changed into a prime (205035357841) 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, 219504 + ... + 676943.

Almost surely, 2^205035357840 is an apocalyptic number.

205035357840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205035357840 is an abundant number, since it is smaller than the sum of its proper divisors (431241917808).

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

205035357840 is a wasteful number, since it uses less digits than its factorization.

205035357840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897416 (or 897410 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 42.

The spelling of 205035357840 in words is "two hundred five billion, thirty-five million, three hundred fifty-seven thousand, eight hundred forty".