26730668251 has 8 divisors (see below), whose sum is σ = 31534797824. Its totient is φ = 22172904360.

The previous prime is 26730668123. The next prime is 26730668257. The reversal of 26730668251 is 15286603762.

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

It is a cyclic number.

It is not a de Polignac number, because 26730668251 - 2⁷ = 26730668123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26730668257) by changing a digit.

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, 61591185 + ... + 61591618.

It is an arithmetic number, because the mean of its divisors is an integer number (3941849728).

Almost surely, 2^26730668251 is an apocalyptic number.

26730668251 is a deficient number, since it is larger than the sum of its proper divisors (4804129573).

26730668251 is a wasteful number, since it uses less digits than its factorization.

26730668251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123182841.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 26730668251 in words is "twenty-six billion, seven hundred thirty million, six hundred sixty-eight thousand, two hundred fifty-one".