261575720683 has 16 divisors (see below), whose sum is σ = 289559313216. Its totient is φ = 235032878080.

The previous prime is 261575720647. The next prime is 261575720689. The reversal of 261575720683 is 386027575162.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 261575720683 - 2¹³ = 261575712491 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 261575720683.

It is not an unprimeable number, because it can be changed into a prime (261575720689) 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, 438316 + ... + 845737.

It is an arithmetic number, because the mean of its divisors is an integer number (18097457076).

Almost surely, 2^261575720683 is an apocalyptic number.

261575720683 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

261575720683 is a deficient number, since it is larger than the sum of its proper divisors (27983592533).

261575720683 is a wasteful number, since it uses less digits than its factorization.

261575720683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284614.

The product of its (nonzero) digits is 4233600, while the sum is 52.

The spelling of 261575720683 in words is "two hundred sixty-one billion, five hundred seventy-five million, seven hundred twenty thousand, six hundred eighty-three".