642464531052 has 96 divisors (see below), whose sum is σ = 1598848118784. Its totient is φ = 200471980800.

The previous prime is 642464531039. The next prime is 642464531081. The reversal of 642464531052 is 250135464246.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 642464530995 and 642464531013.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1170358 + ... + 1629314.

It is an arithmetic number, because the mean of its divisors is an integer number (16654667904).

Almost surely, 2^642464531052 is an apocalyptic number.

642464531052 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

642464531052 is an abundant number, since it is smaller than the sum of its proper divisors (956383587732).

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

642464531052 is a wasteful number, since it uses less digits than its factorization.

642464531052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459119 (or 459117 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 42.

Adding to 642464531052 its reverse (250135464246), we get a palindrome (892599995298).

The spelling of 642464531052 in words is "six hundred forty-two billion, four hundred sixty-four million, five hundred thirty-one thousand, fifty-two".