11998156567 has 2 divisors, whose sum is σ = 11998156568. Its totient is φ = 11998156566.

The previous prime is 11998156553. The next prime is 11998156669. The reversal of 11998156567 is 76565189911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11998156567 - 2¹⁵ = 11998123799 is a prime.

It is a super-2 number, since 2×11998156567² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11998156067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5999078283 + 5999078284.

It is an arithmetic number, because the mean of its divisors is an integer number (5999078284).

Almost surely, 2^11998156567 is an apocalyptic number.

11998156567 is a deficient number, since it is larger than the sum of its proper divisors (1).

11998156567 is an equidigital number, since it uses as much as digits as its factorization.

11998156567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 58.

The spelling of 11998156567 in words is "eleven billion, nine hundred ninety-eight million, one hundred fifty-six thousand, five hundred sixty-seven".