261354463459 has 2 divisors, whose sum is σ = 261354463460. Its totient is φ = 261354463458.

The previous prime is 261354463399. The next prime is 261354463477. The reversal of 261354463459 is 954364453162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261354463459 - 2¹⁷ = 261354332387 is a prime.

It is not a weakly prime, because it can be changed into another prime (261354466459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130677231729 + 130677231730.

It is an arithmetic number, because the mean of its divisors is an integer number (130677231730).

Almost surely, 2^261354463459 is an apocalyptic number.

261354463459 is a deficient number, since it is larger than the sum of its proper divisors (1).

261354463459 is an equidigital number, since it uses as much as digits as its factorization.

261354463459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9331200, while the sum is 52.

The spelling of 261354463459 in words is "two hundred sixty-one billion, three hundred fifty-four million, four hundred sixty-three thousand, four hundred fifty-nine".