26649967406 has 4 divisors (see below), whose sum is σ = 39974951112. Its totient is φ = 13324983702.

The previous prime is 26649967403. The next prime is 26649967411. The reversal of 26649967406 is 60476994662.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26649967403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6662491850 + ... + 6662491853.

It is an arithmetic number, because the mean of its divisors is an integer number (9993737778).

Almost surely, 2^26649967406 is an apocalyptic number.

26649967406 is a deficient number, since it is larger than the sum of its proper divisors (13324983706).

26649967406 is a wasteful number, since it uses less digits than its factorization.

26649967406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13324983705.

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 26649967406 in words is "twenty-six billion, six hundred forty-nine million, nine hundred sixty-seven thousand, four hundred six".