26640204246 has 48 divisors (see below), whose sum is σ = 61222088304. Its totient is φ = 8343171072.

The previous prime is 26640204179. The next prime is 26640204251. The reversal of 26640204246 is 64240204662.

26640204246 is a `hidden beast` number, since 2 + 6 + 6 + 402 + 0 + 4 + 246 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 26640204246.

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 23 ways as a sum of consecutive naturals, for example, 101121 + ... + 252003.

It is an arithmetic number, because the mean of its divisors is an integer number (1275460173).

Almost surely, 2^26640204246 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26640204246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30611044152).

26640204246 is an abundant number, since it is smaller than the sum of its proper divisors (34581884058).

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

26640204246 is a wasteful number, since it uses less digits than its factorization.

26640204246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151485 (or 151482 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 26640204246 in words is "twenty-six billion, six hundred forty million, two hundred four thousand, two hundred forty-six".