642545205063462 has 64 divisors (see below), whose sum is σ = 1442256190652160. Its totient is φ = 212029625308032.

The previous prime is 642545205063457. The next prime is 642545205063479. The reversal of 642545205063462 is 264360502545246.

642545205063462 is a `hidden beast` number, since 6 + 4 + 2 + 5 + 4 + 520 + 50 + 6 + 3 + 4 + 62 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 642545205063399 and 642545205063408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58617948 + ... + 68710655.

It is an arithmetic number, because the mean of its divisors is an integer number (22535252978940).

Almost surely, 2^{642545205063462} is an apocalyptic number.

642545205063462 is an abundant number, since it is smaller than the sum of its proper divisors (799710985588698).

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

642545205063462 is a wasteful number, since it uses less digits than its factorization.

642545205063462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127329554 (or 127329548 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 54.

The spelling of 642545205063462 in words is "six hundred forty-two trillion, five hundred forty-five billion, two hundred five million, sixty-three thousand, four hundred sixty-two".