11601004991 has 2 divisors, whose sum is σ = 11601004992. Its totient is φ = 11601004990.

The previous prime is 11601004979. The next prime is 11601005057. The reversal of 11601004991 is 19940010611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11601004991 - 2⁶ = 11601004927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11601004931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5800502495 + 5800502496.

It is an arithmetic number, because the mean of its divisors is an integer number (5800502496).

Almost surely, 2^11601004991 is an apocalyptic number.

11601004991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11601004991 is an equidigital number, since it uses as much as digits as its factorization.

11601004991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 32.

The spelling of 11601004991 in words is "eleven billion, six hundred one million, four thousand, nine hundred ninety-one".