1968195651 has 16 divisors (see below), whose sum is σ = 2707637760. Its totient is φ = 1271069280.

The previous prime is 1968195643. The next prime is 1968195653. The reversal of 1968195651 is 1565918691.

It is not a de Polignac number, because 1968195651 - 2³ = 1968195643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1968195594 and 1968195603.

It is not an unprimeable number, because it can be changed into a prime (1968195653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65785 + ... + 90906.

It is an arithmetic number, because the mean of its divisors is an integer number (169227360).

Almost surely, 2^1968195651 is an apocalyptic number.

1968195651 is a deficient number, since it is larger than the sum of its proper divisors (739442109).

1968195651 is a wasteful number, since it uses less digits than its factorization.

1968195651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156826.

The product of its digits is 583200, while the sum is 51.

The square root of 1968195651 is about 44364.3511279045. The cubic root of 1968195651 is about 1253.2068381293.

The spelling of 1968195651 in words is "one billion, nine hundred sixty-eight million, one hundred ninety-five thousand, six hundred fifty-one".