206156311455240 has 96 divisors (see below), whose sum is σ = 670070894926680. Its totient is φ = 54969856782336.

The previous prime is 206156311455233. The next prime is 206156311455307. The reversal of 206156311455240 is 42554113651602.

206156311455240 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 5 + 6 + 3 + 114 + 5 + 524 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 40153031836164 + 166003279619076 = 6336642^2 + 12884226^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23031099 + ... + 30704138.

Almost surely, 2^{206156311455240} is an apocalyptic number.

206156311455240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206156311455240 is an abundant number, since it is smaller than the sum of its proper divisors (463914583471440).

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

206156311455240 is a wasteful number, since it uses less digits than its factorization.

206156311455240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53745911 (or 53745904 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 45.

The spelling of 206156311455240 in words is "two hundred six trillion, one hundred fifty-six billion, three hundred eleven million, four hundred fifty-five thousand, two hundred forty".