642380613 has 16 divisors (see below), whose sum is σ = 995458560. Its totient is φ = 360852336.

The previous prime is 642380611. The next prime is 642380623. The reversal of 642380613 is 316083246.

642380613 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 642380613 - 2¹ = 642380611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642380611) 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, 257995 + ... + 260472.

It is an arithmetic number, because the mean of its divisors is an integer number (62216160).

Almost surely, 2^642380613 is an apocalyptic number.

It is an amenable number.

642380613 is a deficient number, since it is larger than the sum of its proper divisors (353077947).

642380613 is a wasteful number, since it uses less digits than its factorization.

642380613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518536.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 642380613 is about 25345.2286042166. The cubic root of 642380613 is about 862.8410695615.

The spelling of 642380613 in words is "six hundred forty-two million, three hundred eighty thousand, six hundred thirteen".