1963619856938 has 16 divisors (see below), whose sum is σ = 2994107312040. Its totient is φ = 965588299200.

The previous prime is 1963619856911. The next prime is 1963619856949. The reversal of 1963619856938 is 8396589163691.

It can be written as a sum of positive squares in 4 ways, for example, as 1726482997849 + 237136859089 = 1313957^2 + 486967^2 .

It is a super-2 number, since 2×1963619856938² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113753 + ... + 1984988.

Almost surely, 2^{1963619856938} is an apocalyptic number.

1963619856938 is a deficient number, since it is larger than the sum of its proper divisors (1030487455102).

1963619856938 is a wasteful number, since it uses less digits than its factorization.

1963619856938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106473.

The product of its digits is 453496320, while the sum is 74.

The spelling of 1963619856938 in words is "one trillion, nine hundred sixty-three billion, six hundred nineteen million, eight hundred fifty-six thousand, nine hundred thirty-eight".