10646321655 has 32 divisors (see below), whose sum is σ = 18044365248. Its totient is φ = 5341593600.

The previous prime is 10646321639. The next prime is 10646321669. The reversal of 10646321655 is 55612364601.

It is not a de Polignac number, because 10646321655 - 2⁴ = 10646321639 is a prime.

It is a super-2 number, since 2×10646321655² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 634575 + ... + 651135.

It is an arithmetic number, because the mean of its divisors is an integer number (563886414).

Almost surely, 2^10646321655 is an apocalyptic number.

10646321655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10646321655 is a deficient number, since it is larger than the sum of its proper divisors (7398043593).

10646321655 is a wasteful number, since it uses less digits than its factorization.

10646321655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19107.

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 10646321655 in words is "ten billion, six hundred forty-six million, three hundred twenty-one thousand, six hundred fifty-five".