1941820663680 has 128 divisors (see below), whose sum is σ = 6877281578400. Its totient is φ = 517818839040.

The previous prime is 1941820663639. The next prime is 1941820663703. The reversal of 1941820663680 is 863660281491.

1941820663680 is a `hidden beast` number, since 19 + 418 + 206 + 6 + 3 + 6 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×1941820663680² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 56169661 + ... + 56204220.

Almost surely, 2^{1941820663680} is an apocalyptic number.

1941820663680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1941820663680 is an abundant number, since it is smaller than the sum of its proper divisors (4935460914720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1941820663680 is a wasteful number, since it uses less digits than its factorization.

1941820663680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112373909 (or 112373891 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 1941820663680 in words is "one trillion, nine hundred forty-one billion, eight hundred twenty million, six hundred sixty-three thousand, six hundred eighty".