206280737540 has 96 divisors (see below), whose sum is σ = 452094289920. Its totient is φ = 78971904000.

The previous prime is 206280737539. The next prime is 206280737557. The reversal of 206280737540 is 45737082602.

It is a junction number, because it is equal to n+sod(n) for n = 206280737491 and 206280737500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97623524 + ... + 97625636.

It is an arithmetic number, because the mean of its divisors is an integer number (4709315520).

Almost surely, 2^206280737540 is an apocalyptic number.

206280737540 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 206280737540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226047144960).

206280737540 is an abundant number, since it is smaller than the sum of its proper divisors (245813552380).

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

206280737540 is a wasteful number, since it uses less digits than its factorization.

206280737540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3813 (or 3811 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 44.

The spelling of 206280737540 in words is "two hundred six billion, two hundred eighty million, seven hundred thirty-seven thousand, five hundred forty".