642056367 has 16 divisors (see below), whose sum is σ = 863688672. Its totient is φ = 424245120.

The previous prime is 642056333. The next prime is 642056369. The reversal of 642056367 is 763650246.

It is not a de Polignac number, because 642056367 - 2¹¹ = 642054319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642056369) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215653 + ... + 218609.

It is an arithmetic number, because the mean of its divisors is an integer number (53980542).

Almost surely, 2^642056367 is an apocalyptic number.

642056367 is a deficient number, since it is larger than the sum of its proper divisors (221632305).

642056367 is a wasteful number, since it uses less digits than its factorization.

642056367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3578.

The product of its (nonzero) digits is 181440, while the sum is 39.

The square root of 642056367 is about 25338.8312082464. The cubic root of 642056367 is about 862.6958701551.

The spelling of 642056367 in words is "six hundred forty-two million, fifty-six thousand, three hundred sixty-seven".