69775123261 has 4 divisors (see below), whose sum is σ = 70559113500. Its totient is φ = 68991133024.

The previous prime is 69775123211. The next prime is 69775123273. The reversal of 69775123261 is 16232157796.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32078959236 + 37696164025 = 179106^2 + 194155^2 .

It is a cyclic number.

It is not a de Polignac number, because 69775123261 - 2⁹ = 69775122749 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 (69775123211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391994986 + ... + 391995163.

It is an arithmetic number, because the mean of its divisors is an integer number (17639778375).

Almost surely, 2^69775123261 is an apocalyptic number.

It is an amenable number.

69775123261 is a deficient number, since it is larger than the sum of its proper divisors (783990239).

69775123261 is an equidigital number, since it uses as much as digits as its factorization.

69775123261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783990238.

The product of its digits is 952560, while the sum is 49.

The spelling of 69775123261 in words is "sixty-nine billion, seven hundred seventy-five million, one hundred twenty-three thousand, two hundred sixty-one".