261570226351 has 16 divisors (see below), whose sum is σ = 330283782144. Its totient is φ = 201840084864.

The previous prime is 261570226327. The next prime is 261570226367. The reversal of 261570226351 is 153622075162.

It is a cyclic number.

It is not a de Polignac number, because 261570226351 - 2⁵ = 261570226319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261570226751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47781375 + ... + 47786848.

It is an arithmetic number, because the mean of its divisors is an integer number (20642736384).

Almost surely, 2^261570226351 is an apocalyptic number.

261570226351 is a deficient number, since it is larger than the sum of its proper divisors (68713555793).

261570226351 is a wasteful number, since it uses less digits than its factorization.

261570226351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95568270.

The product of its (nonzero) digits is 151200, while the sum is 40.

The spelling of 261570226351 in words is "two hundred sixty-one billion, five hundred seventy million, two hundred twenty-six thousand, three hundred fifty-one".