206893980735 has 64 divisors (see below), whose sum is σ = 363131112960. Its totient is φ = 99976757760.

The previous prime is 206893980697. The next prime is 206893980743. The reversal of 206893980735 is 537089398602.

It is a Cunningham number, because it is equal to 454856²-1.

It is a de Polignac number, because none of the positive numbers 2^k-206893980735 is a prime.

It is a super-2 number, since 2×206893980735² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2228800 + ... + 2319770.

It is an arithmetic number, because the mean of its divisors is an integer number (5673923640).

Almost surely, 2^206893980735 is an apocalyptic number.

206893980735 is a deficient number, since it is larger than the sum of its proper divisors (156237132225).

206893980735 is a wasteful number, since it uses less digits than its factorization.

206893980735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91208.

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 206893980735 in words is "two hundred six billion, eight hundred ninety-three million, nine hundred eighty thousand, seven hundred thirty-five".