642663316 has 24 divisors (see below), whose sum is σ = 1179843840. Its totient is φ = 305877600.

The previous prime is 642663313. The next prime is 642663349. The reversal of 642663316 is 613366246.

It is a super-2 number, since 2×642663316² = 826032275464231712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642663313) 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, 30780 + ... + 47251.

It is an arithmetic number, because the mean of its divisors is an integer number (49160160).

Almost surely, 2^642663316 is an apocalyptic number.

It is an amenable number.

642663316 is a deficient number, since it is larger than the sum of its proper divisors (537180524).

642663316 is a wasteful number, since it uses less digits than its factorization.

642663316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78135 (or 78133 counting only the distinct ones).

The product of its digits is 93312, while the sum is 37.

The square root of 642663316 is about 25350.8050365269. The cubic root of 642663316 is about 862.9676258842.

The spelling of 642663316 in words is "six hundred forty-two million, six hundred sixty-three thousand, three hundred sixteen".