642434434246 has 32 divisors (see below), whose sum is σ = 1128342879648. Its totient is φ = 271073341440.

The previous prime is 642434434241. The next prime is 642434434259.

642434434246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642434434196 and 642434434205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642434434241) 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, 11738035 + ... + 11792638.

It is an arithmetic number, because the mean of its divisors is an integer number (35260714989).

Almost surely, 2^642434434246 is an apocalyptic number.

642434434246 is a deficient number, since it is larger than the sum of its proper divisors (485908445402).

642434434246 is a wasteful number, since it uses less digits than its factorization.

642434434246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23530776.

The product of its digits is 5308416, while the sum is 46.

The spelling of 642434434246 in words is "six hundred forty-two billion, four hundred thirty-four million, four hundred thirty-four thousand, two hundred forty-six".