69775780261 has 6 divisors (see below), whose sum is σ = 76695692486. Its totient is φ = 63432527400.

The previous prime is 69775780247. The next prime is 69775780297. The reversal of 69775780261 is 16208757796.

It can be written as a sum of positive squares in only one way, i.e., 45305122500 + 24470657761 = 212850^2 + 156431^2 .

It is not a de Polignac number, because 69775780261 - 2⁵ = 69775780229 is a prime.

It is a super-2 number, since 2×69775780261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 69775780196 and 69775780205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69775780201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 288329550 + ... + 288329791.

Almost surely, 2^69775780261 is an apocalyptic number.

It is an amenable number.

69775780261 is a deficient number, since it is larger than the sum of its proper divisors (6919912225).

69775780261 is a wasteful number, since it uses less digits than its factorization.

69775780261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576659363 (or 576659352 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 58.

The spelling of 69775780261 in words is "sixty-nine billion, seven hundred seventy-five million, seven hundred eighty thousand, two hundred sixty-one".