642846711 has 16 divisors (see below), whose sum is σ = 963196416. Its totient is φ = 378397536.

The previous prime is 642846697. The next prime is 642846727. The reversal of 642846711 is 117648246.

It is not a de Polignac number, because 642846711 - 2⁵ = 642846679 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 642846711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642841711) by changing a digit.

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, 357435 + ... + 359228.

It is an arithmetic number, because the mean of its divisors is an integer number (60199776).

Almost surely, 2^642846711 is an apocalyptic number.

642846711 is a deficient number, since it is larger than the sum of its proper divisors (320349705).

642846711 is a wasteful number, since it uses less digits than its factorization.

642846711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716702.

The product of its digits is 64512, while the sum is 39.

The square root of 642846711 is about 25354.4219220238. The cubic root of 642846711 is about 863.0497056149.

The spelling of 642846711 in words is "six hundred forty-two million, eight hundred forty-six thousand, seven hundred eleven".