10206620643646 has 32 divisors (see below), whose sum is σ = 17662490484480. Its totient is φ = 4332918168576.

The previous prime is 10206620643631. The next prime is 10206620643701. The reversal of 10206620643646 is 64634602660201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 10206620643596 and 10206620643605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13723390 + ... + 14447998.

It is an arithmetic number, because the mean of its divisors is an integer number (551952827640).

Almost surely, 2^{10206620643646} is an apocalyptic number.

10206620643646 is a deficient number, since it is larger than the sum of its proper divisors (7455869840834).

10206620643646 is a wasteful number, since it uses less digits than its factorization.

10206620643646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734128.

The product of its (nonzero) digits is 1492992, while the sum is 46.

The spelling of 10206620643646 in words is "ten trillion, two hundred six billion, six hundred twenty million, six hundred forty-three thousand, six hundred forty-six".