10215705655 has 4 divisors (see below), whose sum is σ = 12258846792. Its totient is φ = 8172564520.

The previous prime is 10215705611. The next prime is 10215705659. The reversal of 10215705655 is 55650751201.

10215705655 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55650751201 = 2039 ⋅27293159.

It is not a de Polignac number, because 10215705655 - 2¹¹ = 10215703607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10215705659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1021570561 + ... + 1021570570.

It is an arithmetic number, because the mean of its divisors is an integer number (3064711698).

Almost surely, 2^10215705655 is an apocalyptic number.

10215705655 is a deficient number, since it is larger than the sum of its proper divisors (2043141137).

10215705655 is an equidigital number, since it uses as much as digits as its factorization.

10215705655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043141136.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 10215705655 in words is "ten billion, two hundred fifteen million, seven hundred five thousand, six hundred fifty-five".