1968978445 has 8 divisors (see below), whose sum is σ = 2700313344. Its totient is φ = 1350156624.

The previous prime is 1968978439. The next prime is 1968978467. The reversal of 1968978445 is 5448798691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1968978445 - 2¹⁷ = 1968847373 is a prime.

It is a super-2 number, since 2×1968978445² = 7753752233749236050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28128229 + ... + 28128298.

It is an arithmetic number, because the mean of its divisors is an integer number (337539168).

Almost surely, 2^1968978445 is an apocalyptic number.

It is an amenable number.

1968978445 is a deficient number, since it is larger than the sum of its proper divisors (731334899).

1968978445 is an equidigital number, since it uses as much as digits as its factorization.

1968978445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56256539.

The product of its digits is 17418240, while the sum is 61.

The square root of 1968978445 is about 44373.1725820906. The cubic root of 1968978445 is about 1253.3729586005.

The spelling of 1968978445 in words is "one billion, nine hundred sixty-eight million, nine hundred seventy-eight thousand, four hundred forty-five".