11401563989 has 2 divisors, whose sum is σ = 11401563990. Its totient is φ = 11401563988.

The previous prime is 11401563967. The next prime is 11401564019. The reversal of 11401563989 is 98936510411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5976063025 + 5425500964 = 77305^2 + 73658^2 .

It is a cyclic number.

It is not a de Polignac number, because 11401563989 - 2²⁸ = 11133128533 is a prime.

It is a super-2 number, since 2×11401563989² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11401566989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5700781994 + 5700781995.

It is an arithmetic number, because the mean of its divisors is an integer number (5700781995).

Almost surely, 2^11401563989 is an apocalyptic number.

It is an amenable number.

11401563989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11401563989 is an equidigital number, since it uses as much as digits as its factorization.

11401563989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 47.

The spelling of 11401563989 in words is "eleven billion, four hundred one million, five hundred sixty-three thousand, nine hundred eighty-nine".