26561947 has 8 divisors (see below), whose sum is σ = 27517952. Its totient is φ = 25612200.

The previous prime is 26561929. The next prime is 26561959. The reversal of 26561947 is 74916562.

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

It is not a de Polignac number, because 26561947 - 2¹⁵ = 26529179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26564947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8122 + ... + 10912.

It is an arithmetic number, because the mean of its divisors is an integer number (3439744).

Almost surely, 2^26561947 is an apocalyptic number.

26561947 is a deficient number, since it is larger than the sum of its proper divisors (956005).

26561947 is a wasteful number, since it uses less digits than its factorization.

26561947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3129.

The product of its digits is 90720, while the sum is 40.

The square root of 26561947 is about 5153.8283828626. The cubic root of 26561947 is about 298.3687273911.

The spelling of 26561947 in words is "twenty-six million, five hundred sixty-one thousand, nine hundred forty-seven".