1968961013485 has 4 divisors (see below), whose sum is σ = 2362753216188. Its totient is φ = 1575168810784.

The previous prime is 1968961013483. The next prime is 1968961013587. The reversal of 1968961013485 is 5843101698691.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1224780463204 + 744180550281 = 1106698^2 + 862659^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968961013485 - 2¹ = 1968961013483 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 (1968961013483) 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, 196896101344 + ... + 196896101353.

It is an arithmetic number, because the mean of its divisors is an integer number (590688304047).

Almost surely, 2^{1968961013485} is an apocalyptic number.

It is an amenable number.

1968961013485 is a deficient number, since it is larger than the sum of its proper divisors (393792202703).

1968961013485 is an equidigital number, since it uses as much as digits as its factorization.

1968961013485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393792202702.

The product of its (nonzero) digits is 11197440, while the sum is 61.

The spelling of 1968961013485 in words is "one trillion, nine hundred sixty-eight billion, nine hundred sixty-one million, thirteen thousand, four hundred eighty-five".