261304416047 has 2 divisors, whose sum is σ = 261304416048. Its totient is φ = 261304416046.

The previous prime is 261304415951. The next prime is 261304416071. The reversal of 261304416047 is 740614403162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261304416047 - 2²⁸ = 261035980591 is a prime.

It is a super-2 number, since 2×261304416047² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 261304416047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261304446047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130652208023 + 130652208024.

It is an arithmetic number, because the mean of its divisors is an integer number (130652208024).

Almost surely, 2^261304416047 is an apocalyptic number.

261304416047 is a deficient number, since it is larger than the sum of its proper divisors (1).

261304416047 is an equidigital number, since it uses as much as digits as its factorization.

261304416047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 38.

The spelling of 261304416047 in words is "two hundred sixty-one billion, three hundred four million, four hundred sixteen thousand, forty-seven".