642453126416 has 20 divisors (see below), whose sum is σ = 1244765825052. Its totient is φ = 321223236096.

The previous prime is 642453126391. The next prime is 642453126433. The reversal of 642453126416 is 614621354246.

It can be written as a sum of positive squares in 2 ways, for example, as 525050956816 + 117402169600 = 724604^2 + 342640^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2306276 + ... + 2569788.

Almost surely, 2^642453126416 is an apocalyptic number.

It is an amenable number.

642453126416 is a deficient number, since it is larger than the sum of its proper divisors (602312698636).

642453126416 is a wasteful number, since it uses less digits than its factorization.

642453126416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415898 (or 415892 counting only the distinct ones).

The product of its digits is 829440, while the sum is 44.

The spelling of 642453126416 in words is "six hundred forty-two billion, four hundred fifty-three million, one hundred twenty-six thousand, four hundred sixteen".