12507758477 has 2 divisors, whose sum is σ = 12507758478. Its totient is φ = 12507758476.

The previous prime is 12507758453. The next prime is 12507758507. The reversal of 12507758477 is 77485770521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6488946916 + 6018811561 = 80554^2 + 77581^2 .

It is a cyclic number.

It is not a de Polignac number, because 12507758477 - 2⁶ = 12507758413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12507758437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6253879238 + 6253879239.

It is an arithmetic number, because the mean of its divisors is an integer number (6253879239).

Almost surely, 2^12507758477 is an apocalyptic number.

It is an amenable number.

12507758477 is a deficient number, since it is larger than the sum of its proper divisors (1).

12507758477 is an equidigital number, since it uses as much as digits as its factorization.

12507758477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3841600, while the sum is 53.

The spelling of 12507758477 in words is "twelve billion, five hundred seven million, seven hundred fifty-eight thousand, four hundred seventy-seven".