26664789789 has 32 divisors (see below), whose sum is σ = 43684982400. Its totient is φ = 15939089280.

The previous prime is 26664789769. The next prime is 26664789821. The reversal of 26664789789 is 98798746662.

It is not a de Polignac number, because 26664789789 - 2¹¹ = 26664787741 is a prime.

It is a super-2 number, since 2×26664789789² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26664789769) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 593254 + ... + 636615.

It is an arithmetic number, because the mean of its divisors is an integer number (1365155700).

Almost surely, 2^26664789789 is an apocalyptic number.

It is an amenable number.

26664789789 is a deficient number, since it is larger than the sum of its proper divisors (17020192611).

26664789789 is a wasteful number, since it uses less digits than its factorization.

26664789789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229962 (or 1229956 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 72.

The spelling of 26664789789 in words is "twenty-six billion, six hundred sixty-four million, seven hundred eighty-nine thousand, seven hundred eighty-nine".