19616243364 has 135 divisors (see below), whose sum is σ = 53200263963. Its totient is φ = 6302610000.

The previous prime is 19616243357. The next prime is 19616243377. The reversal of 19616243364 is 46334261691.

The square root of 19616243364 is 140058.

It is a perfect power (a square), and thus also a powerful number.

19616243364 is a `hidden beast` number, since 1 + 9 + 616 + 24 + 3 + 3 + 6 + 4 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 78152239 + ... + 78152489.

Almost surely, 2^19616243364 is an apocalyptic number.

19616243364 is the 140058-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19616243364

19616243364 is an abundant number, since it is smaller than the sum of its proper divisors (33584020599).

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

19616243364 is an equidigital number, since it uses as much as digits as its factorization.

19616243364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 287 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The spelling of 19616243364 in words is "nineteen billion, six hundred sixteen million, two hundred forty-three thousand, three hundred sixty-four".