261072771451 has 2 divisors, whose sum is σ = 261072771452. Its totient is φ = 261072771450.

The previous prime is 261072771431. The next prime is 261072771457. The reversal of 261072771451 is 154177270162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261072771451 - 2⁹ = 261072770939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261072771398 and 261072771407.

It is not a weakly prime, because it can be changed into another prime (261072771457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130536385725 + 130536385726.

It is an arithmetic number, because the mean of its divisors is an integer number (130536385726).

Almost surely, 2^261072771451 is an apocalyptic number.

261072771451 is a deficient number, since it is larger than the sum of its proper divisors (1).

261072771451 is an equidigital number, since it uses as much as digits as its factorization.

261072771451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 261072771451 in words is "two hundred sixty-one billion, seventy-two million, seven hundred seventy-one thousand, four hundred fifty-one".