10520405506 has 8 divisors (see below), whose sum is σ = 16994501244. Its totient is φ = 4855571760.

The previous prime is 10520405503. The next prime is 10520405543. The reversal of 10520405506 is 60550402501.

It can be written as a sum of positive squares in 2 ways, for example, as 10519579225 + 826281 = 102565^2 + 909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×10520405506² (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 3 ways as a sum of consecutive naturals, for example, 202315465 + ... + 202315516.

Almost surely, 2^10520405506 is an apocalyptic number.

10520405506 is a deficient number, since it is larger than the sum of its proper divisors (6474095738).

10520405506 is a wasteful number, since it uses less digits than its factorization.

10520405506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404630996.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 10520405506 in words is "ten billion, five hundred twenty million, four hundred five thousand, five hundred six".