26815451646 has 64 divisors (see below), whose sum is σ = 57381198336. Its totient is φ = 8333529600.

The previous prime is 26815451591. The next prime is 26815451651. The reversal of 26815451646 is 64615451862.

It is a junction number, because it is equal to n+sod(n) for n = 26815451595 and 26815451604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10245330 + ... + 10247946.

It is an arithmetic number, because the mean of its divisors is an integer number (896581224).

Almost surely, 2^26815451646 is an apocalyptic number.

26815451646 is an abundant number, since it is smaller than the sum of its proper divisors (30565746690).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26815451646 is a wasteful number, since it uses less digits than its factorization.

26815451646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4497.

The product of its digits is 1382400, while the sum is 48.

The spelling of 26815451646 in words is "twenty-six billion, eight hundred fifteen million, four hundred fifty-one thousand, six hundred forty-six".