26640646246 has 16 divisors (see below), whose sum is σ = 43770637440. Its totient is φ = 12104471680.

The previous prime is 26640646237. The next prime is 26640646247. The reversal of 26640646246 is 64264604662.

It is a happy number.

It is a super-3 number, since 3×26640646246³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26640646196 and 26640646205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26640646247) 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, 13508470 + ... + 13510441.

It is an arithmetic number, because the mean of its divisors is an integer number (2735664840).

Almost surely, 2^26640646246 is an apocalyptic number.

26640646246 is a deficient number, since it is larger than the sum of its proper divisors (17129991194).

26640646246 is a wasteful number, since it uses less digits than its factorization.

26640646246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27018959.

The product of its (nonzero) digits is 1990656, while the sum is 46.

The spelling of 26640646246 in words is "twenty-six billion, six hundred forty million, six hundred forty-six thousand, two hundred forty-six".