206520772278 has 32 divisors (see below), whose sum is σ = 424232696160. Its totient is φ = 66975310080.

The previous prime is 206520772273. The next prime is 206520772301. The reversal of 206520772278 is 872277025602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206520772273) 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, 6361648 + ... + 6394028.

It is an arithmetic number, because the mean of its divisors is an integer number (13257271755).

Almost surely, 2^206520772278 is an apocalyptic number.

206520772278 is an abundant number, since it is smaller than the sum of its proper divisors (217711923882).

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

206520772278 is a wasteful number, since it uses less digits than its factorization.

206520772278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61152.

The product of its (nonzero) digits is 1317120, while the sum is 48.

The spelling of 206520772278 in words is "two hundred six billion, five hundred twenty million, seven hundred seventy-two thousand, two hundred seventy-eight".