619974068256 has 144 divisors (see below), whose sum is σ = 1890297249120. Its totient is φ = 197672745600.

The previous prime is 619974068179. The next prime is 619974068267. The reversal of 619974068256 is 652860479916.

619974068256 is a `hidden beast` number, since 6 + 19 + 97 + 406 + 82 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a junction number, because it is equal to n+sod(n) for n = 619974068193 and 619974068202.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221170 + ... + 1135281.

It is an arithmetic number, because the mean of its divisors is an integer number (13127064230).

Almost surely, 2^619974068256 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 619974068256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945148624560).

619974068256 is an abundant number, since it is smaller than the sum of its proper divisors (1270323180864).

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

619974068256 is a wasteful number, since it uses less digits than its factorization.

619974068256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356516 (or 1356479 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 63.

The spelling of 619974068256 in words is "six hundred nineteen billion, nine hundred seventy-four million, sixty-eight thousand, two hundred fifty-six".