1968044651 has 4 divisors (see below), whose sum is σ = 2001401400. Its totient is φ = 1934687904.

The previous prime is 1968044633. The next prime is 1968044671. The reversal of 1968044651 is 1564408691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1564408691 = 229 ⋅6831479.

It is a cyclic number.

It is not a de Polignac number, because 1968044651 - 2¹⁴ = 1968028267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1968044621) 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, 16678286 + ... + 16678403.

It is an arithmetic number, because the mean of its divisors is an integer number (500350350).

Almost surely, 2^1968044651 is an apocalyptic number.

1968044651 is a deficient number, since it is larger than the sum of its proper divisors (33356749).

1968044651 is an equidigital number, since it uses as much as digits as its factorization.

1968044651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33356748.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1968044651 is about 44362.6492784189. The cubic root of 1968044651 is about 1253.1747886272.

The spelling of 1968044651 in words is "one billion, nine hundred sixty-eight million, forty-four thousand, six hundred fifty-one".