26631604465 has 8 divisors (see below), whose sum is σ = 32988826368. Its totient is φ = 20618016240.

The previous prime is 26631604453. The next prime is 26631604511. The reversal of 26631604465 is 56440613662.

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

It is not a de Polignac number, because 26631604465 - 2¹³ = 26631596273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85908247 + ... + 85908556.

It is an arithmetic number, because the mean of its divisors is an integer number (4123603296).

Almost surely, 2^26631604465 is an apocalyptic number.

It is an amenable number.

26631604465 is a deficient number, since it is larger than the sum of its proper divisors (6357221903).

26631604465 is a wasteful number, since it uses less digits than its factorization.

26631604465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171816839.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 26631604465 in words is "twenty-six billion, six hundred thirty-one million, six hundred four thousand, four hundred sixty-five".