261111135007 has 2 divisors, whose sum is σ = 261111135008. Its totient is φ = 261111135006.

The previous prime is 261111134957. The next prime is 261111135037. The reversal of 261111135007 is 700531111162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261111135007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261111135037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130555567503 + 130555567504.

It is an arithmetic number, because the mean of its divisors is an integer number (130555567504).

Almost surely, 2^261111135007 is an apocalyptic number.

261111135007 is a deficient number, since it is larger than the sum of its proper divisors (1).

261111135007 is an equidigital number, since it uses as much as digits as its factorization.

261111135007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 28.

Adding to 261111135007 its reverse (700531111162), we get a palindrome (961642246169).

The spelling of 261111135007 in words is "two hundred sixty-one billion, one hundred eleven million, one hundred thirty-five thousand, seven".