26780990996 has 24 divisors (see below), whose sum is σ = 46994684520. Its totient is φ = 13353984000.

The previous prime is 26780990981. The next prime is 26780991007. The reversal of 26780990996 is 69909908762.

It can be written as a sum of positive squares in 4 ways, for example, as 9917371396 + 16863619600 = 99586^2 + 129860^2 .

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, 2784596 + ... + 2794196.

It is an arithmetic number, because the mean of its divisors is an integer number (1958111855).

Almost surely, 2^26780990996 is an apocalyptic number.

It is an amenable number.

26780990996 is a deficient number, since it is larger than the sum of its proper divisors (20213693524).

26780990996 is a wasteful number, since it uses less digits than its factorization.

26780990996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11435 (or 11433 counting only the distinct ones).

The product of its (nonzero) digits is 26453952, while the sum is 65.

The spelling of 26780990996 in words is "twenty-six billion, seven hundred eighty million, nine hundred ninety thousand, nine hundred ninety-six".