261406697003 has 2 divisors, whose sum is σ = 261406697004. Its totient is φ = 261406697002.

The previous prime is 261406696987. The next prime is 261406697051. The reversal of 261406697003 is 300796604162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261406697003 - 2⁴ = 261406696987 is a prime.

It is a super-2 number, since 2×261406697003² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261406697053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130703348501 + 130703348502.

It is an arithmetic number, because the mean of its divisors is an integer number (130703348502).

Almost surely, 2^261406697003 is an apocalyptic number.

261406697003 is a deficient number, since it is larger than the sum of its proper divisors (1).

261406697003 is an equidigital number, since it uses as much as digits as its factorization.

261406697003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 44.

The spelling of 261406697003 in words is "two hundred sixty-one billion, four hundred six million, six hundred ninety-seven thousand, three".