61276376209 has 2 divisors, whose sum is σ = 61276376210. Its totient is φ = 61276376208.

The previous prime is 61276376167. The next prime is 61276376237. The reversal of 61276376209 is 90267367216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60566686609 + 709689600 = 246103^2 + 26640^2 .

It is a cyclic number.

It is not a de Polignac number, because 61276376209 - 2¹⁷ = 61276245137 is a prime.

It is not a weakly prime, because it can be changed into another prime (61276376009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30638188104 + 30638188105.

It is an arithmetic number, because the mean of its divisors is an integer number (30638188105).

Almost surely, 2^61276376209 is an apocalyptic number.

It is an amenable number.

61276376209 is a deficient number, since it is larger than the sum of its proper divisors (1).

61276376209 is an equidigital number, since it uses as much as digits as its factorization.

61276376209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The spelling of 61276376209 in words is "sixty-one billion, two hundred seventy-six million, three hundred seventy-six thousand, two hundred nine".