642437113750 has 20 divisors (see below), whose sum is σ = 1204184128356. Its totient is φ = 256974845000.

The previous prime is 642437113741. The next prime is 642437113751. The reversal of 642437113750 is 57311734246.

642437113750 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 642437113697 and 642437113706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642437113751) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 256973596 + ... + 256976095.

Almost surely, 2^642437113750 is an apocalyptic number.

642437113750 is a deficient number, since it is larger than the sum of its proper divisors (561747014606).

642437113750 is an equidigital number, since it uses as much as digits as its factorization.

642437113750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513949713 (or 513949698 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 43.

Adding to 642437113750 its reverse (57311734246), we get a palindrome (699748847996).

The spelling of 642437113750 in words is "six hundred forty-two billion, four hundred thirty-seven million, one hundred thirteen thousand, seven hundred fifty".