261442611276503 has 2 divisors, whose sum is σ = 261442611276504. Its totient is φ = 261442611276502.

The previous prime is 261442611276479. The next prime is 261442611276527. The reversal of 261442611276503 is 305672116244162.

It is a balanced prime because it is at equal distance from previous prime (261442611276479) and next prime (261442611276527).

It is a cyclic number.

It is not a de Polignac number, because 261442611276503 - 2⁶ = 261442611276439 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261442611272503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130721305638251 + 130721305638252.

It is an arithmetic number, because the mean of its divisors is an integer number (130721305638252).

Almost surely, 2^{261442611276503} is an apocalyptic number.

261442611276503 is a deficient number, since it is larger than the sum of its proper divisors (1).

261442611276503 is an equidigital number, since it uses as much as digits as its factorization.

261442611276503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 261442611276503 in words is "two hundred sixty-one trillion, four hundred forty-two billion, six hundred eleven million, two hundred seventy-six thousand, five hundred three".