261664784014 has 8 divisors (see below), whose sum is σ = 392529482280. Its totient is φ = 130821623256.

The previous prime is 261664783987. The next prime is 261664784027. The reversal of 261664784014 is 410487466162.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5353969 + ... + 5402620.

It is an arithmetic number, because the mean of its divisors is an integer number (49066185285).

Almost surely, 2^261664784014 is an apocalyptic number.

261664784014 is a deficient number, since it is larger than the sum of its proper divisors (130864698266).

261664784014 is a wasteful number, since it uses less digits than its factorization.

261664784014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10768754.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 261664784014 in words is "two hundred sixty-one billion, six hundred sixty-four million, seven hundred eighty-four thousand, fourteen".