11636905901 has 2 divisors, whose sum is σ = 11636905902. Its totient is φ = 11636905900.

The previous prime is 11636905871. The next prime is 11636905957. The reversal of 11636905901 is 10950963611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10643017225 + 993888676 = 103165^2 + 31526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11636905901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11636905961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5818452950 + 5818452951.

It is an arithmetic number, because the mean of its divisors is an integer number (5818452951).

Almost surely, 2^11636905901 is an apocalyptic number.

It is an amenable number.

11636905901 is a deficient number, since it is larger than the sum of its proper divisors (1).

11636905901 is an equidigital number, since it uses as much as digits as its factorization.

11636905901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 41.

The spelling of 11636905901 in words is "eleven billion, six hundred thirty-six million, nine hundred five thousand, nine hundred one".