1994573722680 has 2048 divisors, whose sum is σ = 9048278016000. Its totient is φ = 378224640000.

The previous prime is 1994573722679. The next prime is 1994573722709. The reversal of 1994573722680 is 862273754991.

1994573722680 is a `hidden beast` number, since 1 + 99 + 457 + 3 + 72 + 26 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 511 ways as a sum of consecutive naturals, for example, 8709928806 + ... + 8709929034.

It is an arithmetic number, because the mean of its divisors is an integer number (4418104500).

It is a 1-persistent number, because it is pandigital, but 2⋅1994573722680 = 3989147445360 is not.

Almost surely, 2^{1994573722680} is an apocalyptic number.

1994573722680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994573722680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4524139008000).

1994573722680 is an abundant number, since it is smaller than the sum of its proper divisors (7053704293320).

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

1994573722680 is a wasteful number, since it uses less digits than its factorization.

1994573722680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 1994573722680 in words is "one trillion, nine hundred ninety-four billion, five hundred seventy-three million, seven hundred twenty-two thousand, six hundred eighty".