261062613251 has 24 divisors (see below), whose sum is σ = 301328385024. Its totient is φ = 224071560000.

The previous prime is 261062613193. The next prime is 261062613277. The reversal of 261062613251 is 152316260162.

It is a de Polignac number, because none of the positive numbers 2^k-261062613251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261062613281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 345506 + ... + 800936.

It is an arithmetic number, because the mean of its divisors is an integer number (12555349376).

Almost surely, 2^261062613251 is an apocalyptic number.

261062613251 is a deficient number, since it is larger than the sum of its proper divisors (40265771773).

261062613251 is a wasteful number, since it uses less digits than its factorization.

261062613251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455555 (or 455514 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 261062613251 in words is "two hundred sixty-one billion, sixty-two million, six hundred thirteen thousand, two hundred fifty-one".