1616866319628 has 240 divisors, whose sum is σ = 5126110133760. Its totient is φ = 434386250496.

The previous prime is 1616866319587. The next prime is 1616866319633. The reversal of 1616866319628 is 8269136686161.

1616866319628 is a `hidden beast` number, since 1 + 616 + 8 + 6 + 6 + 3 + 1 + 9 + 6 + 2 + 8 = 666.

It is a super-2 number, since 2×1616866319628² (a number of 25 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2815000 + ... + 3340352.

It is an arithmetic number, because the mean of its divisors is an integer number (21358792224).

Almost surely, 2^{1616866319628} is an apocalyptic number.

1616866319628 is a gapful number since it is divisible by the number (18) 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 1616866319628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2563055066880).

1616866319628 is an abundant number, since it is smaller than the sum of its proper divisors (3509243814132).

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

1616866319628 is a wasteful number, since it uses less digits than its factorization.

1616866319628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525458 (or 525447 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The spelling of 1616866319628 in words is "one trillion, six hundred sixteen billion, eight hundred sixty-six million, three hundred nineteen thousand, six hundred twenty-eight".