206147975949720 has 384 divisors, whose sum is σ = 815512323225600. Its totient is φ = 45846035790336.

The previous prime is 206147975949623. The next prime is 206147975949791. The reversal of 206147975949720 is 27949579741602.

206147975949720 is a `hidden beast` number, since 2 + 0 + 6 + 1 + 4 + 7 + 9 + 7 + 594 + 9 + 7 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 38425840 + ... + 43460799.

It is an arithmetic number, because the mean of its divisors is an integer number (2123730008400).

Almost surely, 2^{206147975949720} is an apocalyptic number.

206147975949720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206147975949720 is an abundant number, since it is smaller than the sum of its proper divisors (609364347275880).

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

206147975949720 is a wasteful number, since it uses less digits than its factorization.

206147975949720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81886709 (or 81886693 counting only the distinct ones).

The product of its (nonzero) digits is 480090240, while the sum is 72.

The spelling of 206147975949720 in words is "two hundred six trillion, one hundred forty-seven billion, nine hundred seventy-five million, nine hundred forty-nine thousand, seven hundred twenty".