10206621454639 has 2 divisors, whose sum is σ = 10206621454640. Its totient is φ = 10206621454638.

The previous prime is 10206621454621. The next prime is 10206621454681. The reversal of 10206621454639 is 93645412660201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10206621454639 - 2¹¹ = 10206621452591 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10206621454592 and 10206621454601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10206621457639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5103310727319 + 5103310727320.

It is an arithmetic number, because the mean of its divisors is an integer number (5103310727320).

Almost surely, 2^{10206621454639} is an apocalyptic number.

10206621454639 is a deficient number, since it is larger than the sum of its proper divisors (1).

10206621454639 is an equidigital number, since it uses as much as digits as its factorization.

10206621454639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 10206621454639 in words is "ten trillion, two hundred six billion, six hundred twenty-one million, four hundred fifty-four thousand, six hundred thirty-nine".