642135350 has 48 divisors (see below), whose sum is σ = 1226372400. Its totient is φ = 250058880.

The previous prime is 642135341. The next prime is 642135353. The reversal of 642135350 is 53531246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642135353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320552 + ... + 322548.

It is an arithmetic number, because the mean of its divisors is an integer number (25549425).

Almost surely, 2^642135350 is an apocalyptic number.

642135350 is a deficient number, since it is larger than the sum of its proper divisors (584237050).

642135350 is a wasteful number, since it uses less digits than its factorization.

642135350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177 (or 2172 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 642135350 is about 25340.3896970824. The cubic root of 642135350 is about 862.7312437441.

Adding to 642135350 its reverse (53531246), we get a palindrome (695666596).

The spelling of 642135350 in words is "six hundred forty-two million, one hundred thirty-five thousand, three hundred fifty".