642003807654 has 192 divisors, whose sum is σ = 1701697600512. Its totient is φ = 179205696000.

The previous prime is 642003807649. The next prime is 642003807707. The reversal of 642003807654 is 456708300246.

642003807654 is a `hidden beast` number, since 6 + 4 + 200 + 380 + 7 + 65 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4196304 + ... + 4346604.

It is an arithmetic number, because the mean of its divisors is an integer number (8863008336).

Almost surely, 2^642003807654 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642003807654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850848800256).

642003807654 is an abundant number, since it is smaller than the sum of its proper divisors (1059693792858).

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

642003807654 is a wasteful number, since it uses less digits than its factorization.

642003807654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150393 (or 150381 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The spelling of 642003807654 in words is "six hundred forty-two billion, three million, eight hundred seven thousand, six hundred fifty-four".