10516781015 has 16 divisors (see below), whose sum is σ = 13754670048. Its totient is φ = 7672665216.

The previous prime is 10516780931. The next prime is 10516781017. The reversal of 10516781015 is 51018761501.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 10516781015 - 2¹⁰ = 10516779991 is a prime.

It is a super-2 number, since 2×10516781015² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10516781017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 969284 + ... + 980073.

It is an arithmetic number, because the mean of its divisors is an integer number (859666878).

Almost surely, 2^10516781015 is an apocalyptic number.

10516781015 is a deficient number, since it is larger than the sum of its proper divisors (3237889033).

10516781015 is a wasteful number, since it uses less digits than its factorization.

10516781015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949458.

The product of its (nonzero) digits is 8400, while the sum is 35.

The spelling of 10516781015 in words is "ten billion, five hundred sixteen million, seven hundred eighty-one thousand, fifteen".