20155626611 has 2 divisors, whose sum is σ = 20155626612. Its totient is φ = 20155626610.

The previous prime is 20155626587. The next prime is 20155626637. The reversal of 20155626611 is 11662655102.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20155626611 is a prime.

It is not a weakly prime, because it can be changed into another prime (20155626011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077813305 + 10077813306.

It is an arithmetic number, because the mean of its divisors is an integer number (10077813306).

Almost surely, 2^20155626611 is an apocalyptic number.

20155626611 is a deficient number, since it is larger than the sum of its proper divisors (1).

20155626611 is an equidigital number, since it uses as much as digits as its factorization.

20155626611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 20155626611 in words is "twenty billion, one hundred fifty-five million, six hundred twenty-six thousand, six hundred eleven".