1963111947855 has 16 divisors (see below), whose sum is σ = 3277543426560. Its totient is φ = 1001471602208.

The previous prime is 1963111947757. The next prime is 1963111947871. The reversal of 1963111947855 is 5587491113691.

It is a cyclic number.

It is not a de Polignac number, because 1963111947855 - 2⁹ = 1963111947343 is a prime.

It is a super-2 number, since 2×1963111947855² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2845089435 + ... + 2845090124.

It is an arithmetic number, because the mean of its divisors is an integer number (204846464160).

Almost surely, 2^{1963111947855} is an apocalyptic number.

1963111947855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1963111947855 is a deficient number, since it is larger than the sum of its proper divisors (1314431478705).

1963111947855 is a wasteful number, since it uses less digits than its factorization.

1963111947855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5690179590.

The product of its digits is 8164800, while the sum is 60.

The spelling of 1963111947855 in words is "one trillion, nine hundred sixty-three billion, one hundred eleven million, nine hundred forty-seven thousand, eight hundred fifty-five".