642434062305 has 64 divisors (see below), whose sum is σ = 1208151060480. Its totient is φ = 285352429824.

The previous prime is 642434062289. The next prime is 642434062307. The reversal of 642434062305 is 503260434246.

642434062305 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 642434062305 - 2⁴ = 642434062289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (642434062307) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2710666 + ... + 2938124.

It is an arithmetic number, because the mean of its divisors is an integer number (18877360320).

Almost surely, 2^642434062305 is an apocalyptic number.

It is an amenable number.

642434062305 is a deficient number, since it is larger than the sum of its proper divisors (565716998175).

642434062305 is a wasteful number, since it uses less digits than its factorization.

642434062305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228238.

The product of its (nonzero) digits is 414720, while the sum is 39.

The spelling of 642434062305 in words is "six hundred forty-two billion, four hundred thirty-four million, sixty-two thousand, three hundred five".