205890832490 has 16 divisors (see below), whose sum is σ = 423546855552. Its totient is φ = 70591142544.

The previous prime is 205890832453. The next prime is 205890832541. The reversal of 205890832490 is 94238098502.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1470648734 + ... + 1470648873.

It is an arithmetic number, because the mean of its divisors is an integer number (26471678472).

Almost surely, 2^205890832490 is an apocalyptic number.

205890832490 is an abundant number, since it is smaller than the sum of its proper divisors (217656023062).

205890832490 is a wasteful number, since it uses less digits than its factorization.

205890832490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941297621.

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 205890832490 in words is "two hundred five billion, eight hundred ninety million, eight hundred thirty-two thousand, four hundred ninety".