26990784156 has 24 divisors (see below), whose sum is σ = 71975424640. Its totient is φ = 7711652592.

The previous prime is 26990784113. The next prime is 26990784173. The reversal of 26990784156 is 65148709962.

It is a junction number, because it is equal to n+sod(n) for n = 26990784096 and 26990784105.

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, 160659346 + ... + 160659513.

Almost surely, 2^26990784156 is an apocalyptic number.

It is an amenable number.

26990784156 is an abundant number, since it is smaller than the sum of its proper divisors (44984640484).

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

26990784156 is a wasteful number, since it uses less digits than its factorization.

26990784156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321318873 (or 321318871 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 26990784156 in words is "twenty-six billion, nine hundred ninety million, seven hundred eighty-four thousand, one hundred fifty-six".