11636601971 has 2 divisors, whose sum is σ = 11636601972. Its totient is φ = 11636601970.

The previous prime is 11636601959. The next prime is 11636601989. The reversal of 11636601971 is 17910663611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11636601971 - 2²⁶ = 11569493107 is a prime.

It is not a weakly prime, because it can be changed into another prime (11636601901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5818300985 + 5818300986.

It is an arithmetic number, because the mean of its divisors is an integer number (5818300986).

Almost surely, 2^11636601971 is an apocalyptic number.

11636601971 is a deficient number, since it is larger than the sum of its proper divisors (1).

11636601971 is an equidigital number, since it uses as much as digits as its factorization.

11636601971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 11636601971 in words is "eleven billion, six hundred thirty-six million, six hundred one thousand, nine hundred seventy-one".