26213657646 has 16 divisors (see below), whose sum is σ = 57193435008. Its totient is φ = 7943532600.

The previous prime is 26213657627. The next prime is 26213657651. The reversal of 26213657646 is 64675631262.

It is a super-2 number, since 2×26213657646² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26213657595 and 26213657604.

It is a congruent number.

It is an unprimeable number.

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, 198588250 + ... + 198588381.

It is an arithmetic number, because the mean of its divisors is an integer number (3574589688).

Almost surely, 2^26213657646 is an apocalyptic number.

26213657646 is an abundant number, since it is smaller than the sum of its proper divisors (30979777362).

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

26213657646 is a wasteful number, since it uses less digits than its factorization.

26213657646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397176647.

The product of its digits is 2177280, while the sum is 48.

The spelling of 26213657646 in words is "twenty-six billion, two hundred thirteen million, six hundred fifty-seven thousand, six hundred forty-six".