642807519696 has 240 divisors, whose sum is σ = 1878983695680. Its totient is φ = 204990186240.

The previous prime is 642807519677. The next prime is 642807519703. The reversal of 642807519696 is 696915708246.

642807519696 is a `hidden beast` number, since 6 + 4 + 28 + 0 + 7 + 519 + 6 + 96 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3046481031 + ... + 3046481241.

It is an arithmetic number, because the mean of its divisors is an integer number (7829098732).

Almost surely, 2^642807519696 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 642807519696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939491847840).

642807519696 is an abundant number, since it is smaller than the sum of its proper divisors (1236176175984).

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

642807519696 is an equidigital number, since it uses as much as digits as its factorization.

642807519696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 336 counting only the distinct ones).

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

The spelling of 642807519696 in words is "six hundred forty-two billion, eight hundred seven million, five hundred nineteen thousand, six hundred ninety-six".