261164452123 has 8 divisors (see below), whose sum is σ = 261850646736. Its totient is φ = 260478432000.

The previous prime is 261164452067. The next prime is 261164452181. The reversal of 261164452123 is 321254461162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261164452123 - 2¹⁷ = 261164321051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261164452723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3285415 + ... + 3363967.

It is an arithmetic number, because the mean of its divisors is an integer number (32731330842).

Almost surely, 2^261164452123 is an apocalyptic number.

261164452123 is a deficient number, since it is larger than the sum of its proper divisors (686194613).

261164452123 is an equidigital number, since it uses as much as digits as its factorization.

261164452123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87245.

The product of its digits is 69120, while the sum is 37.

The spelling of 261164452123 in words is "two hundred sixty-one billion, one hundred sixty-four million, four hundred fifty-two thousand, one hundred twenty-three".