26649907331 has 8 divisors (see below), whose sum is σ = 26705445120. Its totient is φ = 26594399752.

The previous prime is 26649907313. The next prime is 26649907351. The reversal of 26649907331 is 13370994662.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26649907331 is a prime.

It is a super-2 number, since 2×26649907331² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26649907331.

It is not an unprimeable number, because it can be changed into a prime (26649907351) 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, 2764586 + ... + 2774208.

It is an arithmetic number, because the mean of its divisors is an integer number (3338180640).

Almost surely, 2^26649907331 is an apocalyptic number.

26649907331 is a deficient number, since it is larger than the sum of its proper divisors (55537789).

26649907331 is an equidigital number, since it uses as much as digits as its factorization.

26649907331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15105.

The product of its (nonzero) digits is 1469664, while the sum is 50.

The spelling of 26649907331 in words is "twenty-six billion, six hundred forty-nine million, nine hundred seven thousand, three hundred thirty-one".