12545201477 has 2 divisors, whose sum is σ = 12545201478. Its totient is φ = 12545201476.

The previous prime is 12545201399. The next prime is 12545201503. The reversal of 12545201477 is 77410254521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10672129636 + 1873071841 = 103306^2 + 43279^2 .

It is a cyclic number.

It is not a de Polignac number, because 12545201477 - 2¹² = 12545197381 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12545201477.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12545201077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272600738 + 6272600739.

It is an arithmetic number, because the mean of its divisors is an integer number (6272600739).

Almost surely, 2^12545201477 is an apocalyptic number.

It is an amenable number.

12545201477 is a deficient number, since it is larger than the sum of its proper divisors (1).

12545201477 is an equidigital number, since it uses as much as digits as its factorization.

12545201477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78400, while the sum is 38.

Adding to 12545201477 its reverse (77410254521), we get a palindrome (89955455998).

The spelling of 12545201477 in words is "twelve billion, five hundred forty-five million, two hundred one thousand, four hundred seventy-seven".