642136175 has 12 divisors (see below), whose sum is σ = 796581456. Its totient is φ = 513494400.

The previous prime is 642136169. The next prime is 642136177. The reversal of 642136175 is 571631246.

642136175 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 642136175 - 2¹² = 642132079 is a prime.

It is a super-3 number, since 3×642136175³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642136177) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86615 + ... + 93735.

It is an arithmetic number, because the mean of its divisors is an integer number (66381788).

Almost surely, 2^642136175 is an apocalyptic number.

642136175 is a deficient number, since it is larger than the sum of its proper divisors (154445281).

642136175 is a wasteful number, since it uses less digits than its factorization.

642136175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10738 (or 10733 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 642136175 is about 25340.4059754377. The cubic root of 642136175 is about 862.7316132160.

The spelling of 642136175 in words is "six hundred forty-two million, one hundred thirty-six thousand, one hundred seventy-five".