11388195967 has 4 divisors (see below), whose sum is σ = 11388413800. Its totient is φ = 11387978136.

The previous prime is 11388195961. The next prime is 11388195971. The reversal of 11388195967 is 76959188311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76959188311 = 28597 ⋅2691163.

It is a 3-Lehmer number, since φ(11388195967) divides (11388195967-1)³.

It is a cyclic number.

It is not a de Polignac number, because 11388195967 - 2⁷ = 11388195839 is a prime.

It is a deceptive number, since it divides R_11388195966.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11388195961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21784 + ... + 152482.

It is an arithmetic number, because the mean of its divisors is an integer number (2847103450).

Almost surely, 2^11388195967 is an apocalyptic number.

11388195967 is the 87133-rd pentagonal number.

11388195967 is a deficient number, since it is larger than the sum of its proper divisors (217833).

11388195967 is an equidigital number, since it uses as much as digits as its factorization.

11388195967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217832.

The product of its digits is 3265920, while the sum is 58.

The spelling of 11388195967 in words is "eleven billion, three hundred eighty-eight million, one hundred ninety-five thousand, nine hundred sixty-seven".