1999356424704 has 160 divisors (see below), whose sum is σ = 5963416620480. Its totient is φ = 661364121600.

The previous prime is 1999356424657. The next prime is 1999356424717. The reversal of 1999356424704 is 4074246539991.

1999356424704 is a `hidden beast` number, since 1 + 9 + 9 + 93 + 56 + 424 + 70 + 4 = 666.

It is a super-2 number, since 2×1999356424704² (a number of 25 digits) contains 22 as substring.

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, 1258924 + ... + 2362964.

It is an arithmetic number, because the mean of its divisors is an integer number (37271353878).

Almost surely, 2^{1999356424704} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999356424704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2981708310240).

1999356424704 is an abundant number, since it is smaller than the sum of its proper divisors (3964060195776).

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

1999356424704 is a wasteful number, since it uses less digits than its factorization.

1999356424704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104199 (or 1104177 counting only the distinct ones).

The product of its (nonzero) digits is 58786560, while the sum is 63.

The spelling of 1999356424704 in words is "one trillion, nine hundred ninety-nine billion, three hundred fifty-six million, four hundred twenty-four thousand, seven hundred four".