642462510 has 16 divisors (see below), whose sum is σ = 1541910096. Its totient is φ = 171323328.

The previous prime is 642462481. The next prime is 642462511. The reversal of 642462510 is 15264246.

642462510 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×642462510³ (a number of 27 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 21415417 = 642462510 / (6 + 4 + 2 + 4 + 6 + 2 + 5 + 1 + 0).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642462511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10707679 + ... + 10707738.

It is an arithmetic number, because the mean of its divisors is an integer number (96369381).

Almost surely, 2^642462510 is an apocalyptic number.

642462510 is an abundant number, since it is smaller than the sum of its proper divisors (899447586).

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

642462510 is a wasteful number, since it uses less digits than its factorization.

642462510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21415427.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 642462510 is about 25346.8441822646. The cubic root of 642462510 is about 862.8777358260.

The spelling of 642462510 in words is "six hundred forty-two million, four hundred sixty-two thousand, five hundred ten".