261724085466 has 16 divisors (see below), whose sum is σ = 524330889984. Its totient is φ = 87094241984.

The previous prime is 261724085431. The next prime is 261724085561. The reversal of 261724085466 is 664580427162.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36776106 + ... + 36783221.

It is an arithmetic number, because the mean of its divisors is an integer number (32770680624).

Almost surely, 2^261724085466 is an apocalyptic number.

261724085466 is an abundant number, since it is smaller than the sum of its proper divisors (262606804518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261724085466 is a wasteful number, since it uses less digits than its factorization.

261724085466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73559925.

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 261724085466 in words is "two hundred sixty-one billion, seven hundred twenty-four million, eighty-five thousand, four hundred sixty-six".