1721603142216 has 48 divisors (see below), whose sum is σ = 4662941163660. Its totient is φ = 573834977280.

The previous prime is 1721603142187. The next prime is 1721603142253. The reversal of 1721603142216 is 6122413061271.

1721603142216 is a `hidden beast` number, since 1 + 7 + 2 + 1 + 603 + 1 + 42 + 2 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1482135804900 + 239467337316 = 1217430^2 + 489354^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 605656 + ... + 1951928.

Almost surely, 2^{1721603142216} is an apocalyptic number.

It is an amenable number.

1721603142216 is an abundant number, since it is smaller than the sum of its proper divisors (2941338021444).

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

1721603142216 is a wasteful number, since it uses less digits than its factorization.

1721603142216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1364046 (or 1364039 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 1721603142216 in words is "one trillion, seven hundred twenty-one billion, six hundred three million, one hundred forty-two thousand, two hundred sixteen".