12520662545 has 16 divisors (see below), whose sum is σ = 15533096448. Its totient is φ = 9681249600.

The previous prime is 12520662529. The next prime is 12520662569. The reversal of 12520662545 is 54526602521.

It is a happy number.

It is not a de Polignac number, because 12520662545 - 2⁴ = 12520662529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12520662499 and 12520662508.

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, 196169 + ... + 252038.

It is an arithmetic number, because the mean of its divisors is an integer number (970818528).

Almost surely, 2^12520662545 is an apocalyptic number.

It is an amenable number.

12520662545 is a deficient number, since it is larger than the sum of its proper divisors (3012433903).

12520662545 is a wasteful number, since it uses less digits than its factorization.

12520662545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448400.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 12520662545 in words is "twelve billion, five hundred twenty million, six hundred sixty-two thousand, five hundred forty-five".