12470771561 has 2 divisors, whose sum is σ = 12470771562. Its totient is φ = 12470771560.

The previous prime is 12470771539. The next prime is 12470771587. The reversal of 12470771561 is 16517707421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10807681600 + 1663089961 = 103960^2 + 40781^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12470771561 is a prime.

It is not a weakly prime, because it can be changed into another prime (12470776561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6235385780 + 6235385781.

It is an arithmetic number, because the mean of its divisors is an integer number (6235385781).

Almost surely, 2^12470771561 is an apocalyptic number.

It is an amenable number.

12470771561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12470771561 is an equidigital number, since it uses as much as digits as its factorization.

12470771561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82320, while the sum is 41.

The spelling of 12470771561 in words is "twelve billion, four hundred seventy million, seven hundred seventy-one thousand, five hundred sixty-one".