642011510 has 16 divisors (see below), whose sum is σ = 1320709536. Its totient is φ = 220118208.

The previous prime is 642011507. The next prime is 642011521. The reversal of 642011510 is 15110246.

It is a congruent number.

It is an unprimeable number.

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, 4585727 + ... + 4585866.

It is an arithmetic number, because the mean of its divisors is an integer number (82544346).

Almost surely, 2^642011510 is an apocalyptic number.

642011510 is an abundant number, since it is smaller than the sum of its proper divisors (678698026).

642011510 is a wasteful number, since it uses less digits than its factorization.

642011510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9171607.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 642011510 is about 25337.9460493545. The cubic root of 642011510 is about 862.6757790583.

Adding to 642011510 its reverse (15110246), we get a palindrome (657121756).

The spelling of 642011510 in words is "six hundred forty-two million, eleven thousand, five hundred ten".