206021103151646 has 4 divisors (see below), whose sum is σ = 309031654727472. Its totient is φ = 103010551575822.

The previous prime is 206021103151639. The next prime is 206021103151651. The reversal of 206021103151646 is 646151301120602.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×206021103151646² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51505275787910 + ... + 51505275787913.

It is an arithmetic number, because the mean of its divisors is an integer number (77257913681868).

Almost surely, 2^{206021103151646} is an apocalyptic number.

206021103151646 is a deficient number, since it is larger than the sum of its proper divisors (103010551575826).

206021103151646 is a wasteful number, since it uses less digits than its factorization.

206021103151646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103010551575825.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 206021103151646 in words is "two hundred six trillion, twenty-one billion, one hundred three million, one hundred fifty-one thousand, six hundred forty-six".