10520405505 has 72 divisors (see below), whose sum is σ = 19470342528. Its totient is φ = 5252182848.

The previous prime is 10520405503. The next prime is 10520405543. The reversal of 10520405505 is 50550402501.

10520405505 is a `hidden beast` number, since 105 + 2 + 0 + 4 + 0 + 550 + 5 = 666.

It is not a de Polignac number, because 10520405505 - 2¹ = 10520405503 is a prime.

It is a super-2 number, since 2×10520405505² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10520405503) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1114134 + ... + 1123536.

It is an arithmetic number, because the mean of its divisors is an integer number (270421424).

Almost surely, 2^10520405505 is an apocalyptic number.

10520405505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10520405505 is a deficient number, since it is larger than the sum of its proper divisors (8949937023).

10520405505 is a wasteful number, since it uses less digits than its factorization.

10520405505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9507 (or 9481 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

It can be divided in two parts, 10520 and 405505, that added together give a square (416025 = 645²).

The spelling of 10520405505 in words is "ten billion, five hundred twenty million, four hundred five thousand, five hundred five".