261092466829 has 4 divisors (see below), whose sum is σ = 263677540860. Its totient is φ = 258507392800.

The previous prime is 261092466823. The next prime is 261092466907. The reversal of 261092466829 is 928664290162.

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 257018580900 + 4073885929 = 506970^2 + 63827^2 .

It is a cyclic number.

It is not a de Polignac number, because 261092466829 - 2⁹ = 261092466317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261092466829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261092466823) 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, 1292536864 + ... + 1292537065.

It is an arithmetic number, because the mean of its divisors is an integer number (65919385215).

Almost surely, 2^261092466829 is an apocalyptic number.

It is an amenable number.

261092466829 is a deficient number, since it is larger than the sum of its proper divisors (2585074031).

261092466829 is a wasteful number, since it uses less digits than its factorization.

261092466829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2585074030.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 261092466829 in words is "two hundred sixty-one billion, ninety-two million, four hundred sixty-six thousand, eight hundred twenty-nine".