10206620643645 has 48 divisors (see below), whose sum is σ = 17721643447872. Its totient is φ = 5434251217920.

The previous prime is 10206620643631. The next prime is 10206620643701. The reversal of 10206620643645 is 54634602660201.

It is a happy number.

10206620643645 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 6 + 6 + 206 + 436 + 4 + 5 = 666.

It is not a de Polignac number, because 10206620643645 - 2¹¹ = 10206620641597 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 10206620643645.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226856842 + ... + 226901828.

It is an arithmetic number, because the mean of its divisors is an integer number (369200905164).

Almost surely, 2^{10206620643645} is an apocalyptic number.

10206620643645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10206620643645 is a deficient number, since it is larger than the sum of its proper divisors (7515022804227).

10206620643645 is a wasteful number, since it uses less digits than its factorization.

10206620643645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53482 (or 53479 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 45.

The spelling of 10206620643645 in words is "ten trillion, two hundred six billion, six hundred twenty million, six hundred forty-three thousand, six hundred forty-five".