642465500 has 24 divisors (see below), whose sum is σ = 1403145744. Its totient is φ = 256986000.

The previous prime is 642465469. The next prime is 642465503. The reversal of 642465500 is 5564246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642465503) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 641966 + ... + 642965.

It is an arithmetic number, because the mean of its divisors is an integer number (58464406).

Almost surely, 2^642465500 is an apocalyptic number.

It is an amenable number.

642465500 is an abundant number, since it is smaller than the sum of its proper divisors (760680244).

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

642465500 is a wasteful number, since it uses less digits than its factorization.

642465500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1284950 (or 1284938 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 642465500 is about 25346.9031638976. The cubic root of 642465500 is about 862.8790744257.

The spelling of 642465500 in words is "six hundred forty-two million, four hundred sixty-five thousand, five hundred".