10516621065 has 16 divisors (see below), whose sum is σ = 17184607488. Its totient is φ = 5489526656.

The previous prime is 10516621043. The next prime is 10516621081. The reversal of 10516621065 is 56012661501.

It is a cyclic number.

It is not a de Polignac number, because 10516621065 - 2¹⁰ = 10516620041 is a prime.

It is a super-2 number, since 2×10516621065² (a number of 21 digits) contains 22 as substring.

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, 7457892 + ... + 7459301.

It is an arithmetic number, because the mean of its divisors is an integer number (1074037968).

Almost surely, 2^10516621065 is an apocalyptic number.

10516621065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10516621065 is a deficient number, since it is larger than the sum of its proper divisors (6667986423).

10516621065 is a wasteful number, since it uses less digits than its factorization.

10516621065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14917248.

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 10516621065 in words is "ten billion, five hundred sixteen million, six hundred twenty-one thousand, sixty-five".