26440215261 has 8 divisors (see below), whose sum is σ = 36073472160. Its totient is φ = 17216884272.

The previous prime is 26440215233. The next prime is 26440215323. The reversal of 26440215261 is 16251204462.

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

It is not a de Polignac number, because 26440215261 - 2¹³ = 26440207069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26440215761) 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, 102481326 + ... + 102481583.

It is an arithmetic number, because the mean of its divisors is an integer number (4509184020).

Almost surely, 2^26440215261 is an apocalyptic number.

It is an amenable number.

26440215261 is a deficient number, since it is larger than the sum of its proper divisors (9633256899).

26440215261 is a wasteful number, since it uses less digits than its factorization.

26440215261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204962955.

The product of its (nonzero) digits is 23040, while the sum is 33.

The spelling of 26440215261 in words is "twenty-six billion, four hundred forty million, two hundred fifteen thousand, two hundred sixty-one".