17157378811 has 4 divisors (see below), whose sum is σ = 17522429472. Its totient is φ = 16792328152.

The previous prime is 17157378769. The next prime is 17157378857. The reversal of 17157378811 is 11887375171.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 17157378811 - 2¹⁵ = 17157346043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17157378871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182525260 + ... + 182525353.

It is an arithmetic number, because the mean of its divisors is an integer number (4380607368).

Almost surely, 2^17157378811 is an apocalyptic number.

17157378811 is a deficient number, since it is larger than the sum of its proper divisors (365050661).

17157378811 is an equidigital number, since it uses as much as digits as its factorization.

17157378811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365050660.

The product of its digits is 329280, while the sum is 49.

The spelling of 17157378811 in words is "seventeen billion, one hundred fifty-seven million, three hundred seventy-eight thousand, eight hundred eleven".