26618987361 has 8 divisors (see below), whose sum is σ = 35493548320. Its totient is φ = 17745208992.

The previous prime is 26618987359. The next prime is 26618987389. The reversal of 26618987361 is 16378981662.

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

It is not a de Polignac number, because 26618987361 - 2¹ = 26618987359 is a prime.

It is a super-3 number, since 3×26618987361³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26618987261) 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, 111055 + ... + 256068.

It is an arithmetic number, because the mean of its divisors is an integer number (4436693540).

Almost surely, 2^26618987361 is an apocalyptic number.

It is an amenable number.

26618987361 is a deficient number, since it is larger than the sum of its proper divisors (8874560959).

26618987361 is a wasteful number, since it uses less digits than its factorization.

26618987361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391295.

The product of its digits is 5225472, while the sum is 57.

The spelling of 26618987361 in words is "twenty-six billion, six hundred eighteen million, nine hundred eighty-seven thousand, three hundred sixty-one".