1964376039844 has 9 divisors (see below), whose sum is σ = 3437662975201. Its totient is φ = 982186618360.

The previous prime is 1964376039841. The next prime is 1964376039853. The reversal of 1964376039844 is 4489306734691.

The square root of 1964376039844 is 1401562.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1833418905444 + 130957134400 = 1354038^2 + 361880^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1964376039841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2452734 + ... + 3153514.

Almost surely, 2^{1964376039844} is an apocalyptic number.

1964376039844 is the 1401562-nd square number.

It is an amenable number.

1964376039844 is a deficient number, since it is larger than the sum of its proper divisors (1473286935357).

1964376039844 is an frugal number, since it uses more digits than its factorization.

1964376039844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401566 (or 700783 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 64.

Multiplying 1964376039844 by its sum of digits (64), we get a square (125720066550016 = 11212496²).

The spelling of 1964376039844 in words is "one trillion, nine hundred sixty-four billion, three hundred seventy-six million, thirty-nine thousand, eight hundred forty-four".