642063064 has 32 divisors (see below), whose sum is σ = 1226707200. Its totient is φ = 314968320.

The previous prime is 642063061. The next prime is 642063073. The reversal of 642063064 is 460360246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642063061) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 221577 + ... + 224455.

It is an arithmetic number, because the mean of its divisors is an integer number (38334600).

Almost surely, 2^642063064 is an apocalyptic number.

It is an amenable number.

642063064 is a deficient number, since it is larger than the sum of its proper divisors (584644136).

642063064 is a wasteful number, since it uses less digits than its factorization.

642063064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403 (or 3399 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 642063064 is about 25338.9633568542. The cubic root of 642063064 is about 862.6988696084.

The spelling of 642063064 in words is "six hundred forty-two million, sixty-three thousand, sixty-four".