261954794283 has 64 divisors (see below), whose sum is σ = 436531694592. Its totient is φ = 136036454400.

The previous prime is 261954794281. The next prime is 261954794287. The reversal of 261954794283 is 382497459162.

It is a happy number.

It is not a de Polignac number, because 261954794283 - 2¹ = 261954794281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (261954794281) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 51230535 + ... + 51235647.

It is an arithmetic number, because the mean of its divisors is an integer number (6820807728).

Almost surely, 2^261954794283 is an apocalyptic number.

261954794283 is a deficient number, since it is larger than the sum of its proper divisors (174576900309).

261954794283 is a wasteful number, since it uses less digits than its factorization.

261954794283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8004.

The product of its digits is 26127360, while the sum is 60.

The spelling of 261954794283 in words is "two hundred sixty-one billion, nine hundred fifty-four million, seven hundred ninety-four thousand, two hundred eighty-three".