206989499490 has 32 divisors (see below), whose sum is σ = 499822508736. Its totient is φ = 54858565440.

The previous prime is 206989499467. The next prime is 206989499491. The reversal of 206989499490 is 94994989602.

It is not an unprimeable number, because it can be changed into a prime (206989499491) 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, 21159681 + ... + 21169460.

It is an arithmetic number, because the mean of its divisors is an integer number (15619453398).

Almost surely, 2^206989499490 is an apocalyptic number.

206989499490 is an abundant number, since it is smaller than the sum of its proper divisors (292833009246).

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

206989499490 is a wasteful number, since it uses less digits than its factorization.

206989499490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42329314.

The product of its (nonzero) digits is 90699264, while the sum is 69.

The spelling of 206989499490 in words is "two hundred six billion, nine hundred eighty-nine million, four hundred ninety-nine thousand, four hundred ninety".