1968081151 has 4 divisors (see below), whose sum is σ = 1970681752. Its totient is φ = 1965480552.

The previous prime is 1968081121. The next prime is 1968081179. The reversal of 1968081151 is 1511808691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1968081151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968081121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1299165 + ... + 1300678.

It is an arithmetic number, because the mean of its divisors is an integer number (492670438).

Almost surely, 2^1968081151 is an apocalyptic number.

1968081151 is a deficient number, since it is larger than the sum of its proper divisors (2600601).

1968081151 is an equidigital number, since it uses as much as digits as its factorization.

1968081151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600600.

The product of its (nonzero) digits is 17280, while the sum is 40.

The square root of 1968081151 is about 44363.0606586155. The cubic root of 1968081151 is about 1253.1825358425.

The spelling of 1968081151 in words is "one billion, nine hundred sixty-eight million, eighty-one thousand, one hundred fifty-one".