1999468793520 has 240 divisors, whose sum is σ = 7596635784192. Its totient is φ = 484719655680.

The previous prime is 1999468793437. The next prime is 1999468793557. The reversal of 1999468793520 is 253978649991.

1999468793520 is a `hidden beast` number, since 1 + 9 + 9 + 9 + 4 + 6 + 8 + 7 + 93 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4461312 + ... + 4888991.

It is a 1-persistent number, because it is pandigital, but 2⋅1999468793520 = 3998937587040 is not.

Almost surely, 2^{1999468793520} is an apocalyptic number.

1999468793520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1999468793520 is an abundant number, since it is smaller than the sum of its proper divisors (5597166990672).

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

1999468793520 is a wasteful number, since it uses less digits than its factorization.

1999468793520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9350342 (or 9350324 counting only the distinct ones).

The product of its (nonzero) digits is 264539520, while the sum is 72.

The spelling of 1999468793520 in words is "one trillion, nine hundred ninety-nine billion, four hundred sixty-eight million, seven hundred ninety-three thousand, five hundred twenty".