12545555002 has 4 divisors (see below), whose sum is σ = 18818332506. Its totient is φ = 6272777500.

The previous prime is 12545554993. The next prime is 12545555003. The reversal of 12545555002 is 20055554521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20055554521 = 83 ⋅241633187.

It can be written as a sum of positive squares in only one way, i.e., 7042734241 + 5502820761 = 83921^2 + 74181^2 .

It is not an unprimeable number, because it can be changed into a prime (12545555003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3136388749 + ... + 3136388752.

Almost surely, 2^12545555002 is an apocalyptic number.

12545555002 is a deficient number, since it is larger than the sum of its proper divisors (6272777504).

12545555002 is an equidigital number, since it uses as much as digits as its factorization.

12545555002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6272777503.

The product of its (nonzero) digits is 50000, while the sum is 34.

The spelling of 12545555002 in words is "twelve billion, five hundred forty-five million, five hundred fifty-five thousand, two".