26661529105 has 16 divisors (see below), whose sum is σ = 32193552384. Its totient is φ = 21196192960.

The previous prime is 26661529093. The next prime is 26661529109. The reversal of 26661529105 is 50192516662.

It is not a de Polignac number, because 26661529105 - 2⁵ = 26661529073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26661529109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2318520 + ... + 2329990.

It is an arithmetic number, because the mean of its divisors is an integer number (2012097024).

Almost surely, 2^26661529105 is an apocalyptic number.

It is an amenable number.

26661529105 is a deficient number, since it is larger than the sum of its proper divisors (5532023279).

26661529105 is a wasteful number, since it uses less digits than its factorization.

26661529105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14336.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 26661529105 in words is "twenty-six billion, six hundred sixty-one million, five hundred twenty-nine thousand, one hundred five".