1968633511 has 12 divisors (see below), whose sum is σ = 2133919080. Its totient is φ = 1815322080.

The previous prime is 1968633497. The next prime is 1968633533. The reversal of 1968633511 is 1153368691.

It is a happy number.

It is not a de Polignac number, because 1968633511 - 2⁷ = 1968633383 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 (1968633551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173820 + ... + 184798.

It is an arithmetic number, because the mean of its divisors is an integer number (177826590).

Almost surely, 2^1968633511 is an apocalyptic number.

1968633511 is a deficient number, since it is larger than the sum of its proper divisors (165285569).

1968633511 is a wasteful number, since it uses less digits than its factorization.

1968633511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12066 (or 12053 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 1968633511 is about 44369.2856715093. The cubic root of 1968633511 is about 1253.2997639282.

The spelling of 1968633511 in words is "one billion, nine hundred sixty-eight million, six hundred thirty-three thousand, five hundred eleven".