642301755 has 16 divisors (see below), whose sum is σ = 1032904224. Its totient is φ = 340820480.

The previous prime is 642301729. The next prime is 642301763. The reversal of 642301755 is 557103246.

It is not a de Polignac number, because 642301755 - 2⁶ = 642301691 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105726 + ... + 111635.

It is an arithmetic number, because the mean of its divisors is an integer number (64556514).

Almost surely, 2^642301755 is an apocalyptic number.

642301755 is a deficient number, since it is larger than the sum of its proper divisors (390602469).

642301755 is a wasteful number, since it uses less digits than its factorization.

642301755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217566.

The product of its (nonzero) digits is 25200, while the sum is 33.

The square root of 642301755 is about 25343.6728790442. The cubic root of 642301755 is about 862.8057609484.

The spelling of 642301755 in words is "six hundred forty-two million, three hundred one thousand, seven hundred fifty-five".