1720880328650 has 48 divisors (see below), whose sum is σ = 3658244000256. Its totient is φ = 589992870720.

The previous prime is 1720880328647. The next prime is 1720880328653. The reversal of 1720880328650 is 568230880271.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1720880328647) and next prime (1720880328653).

It is a super-2 number, since 2×1720880328650² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is not an unprimeable number, because it can be changed into a prime (1720880328653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10434632 + ... + 10598268.

It is an arithmetic number, because the mean of its divisors is an integer number (76213416672).

Almost surely, 2^{1720880328650} is an apocalyptic number.

1720880328650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1720880328650 is an abundant number, since it is smaller than the sum of its proper divisors (1937363671606).

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

1720880328650 is a wasteful number, since it uses less digits than its factorization.

1720880328650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193703 (or 193698 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 1720880328650 in words is "one trillion, seven hundred twenty billion, eight hundred eighty million, three hundred twenty-eight thousand, six hundred fifty".