642611016413 has 4 divisors (see below), whose sum is σ = 643764717180. Its totient is φ = 641457315648.

The previous prime is 642611016371. The next prime is 642611016431. The reversal of 642611016413 is 314610116246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 404727537124 + 237883479289 = 636182^2 + 487733^2 .

It is a cyclic number.

It is not a de Polignac number, because 642611016413 - 2⁶ = 642611016349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642611013413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576849548 + ... + 576850661.

It is an arithmetic number, because the mean of its divisors is an integer number (160941179295).

Almost surely, 2^642611016413 is an apocalyptic number.

It is an amenable number.

642611016413 is a deficient number, since it is larger than the sum of its proper divisors (1153700767).

642611016413 is a wasteful number, since it uses less digits than its factorization.

642611016413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153700766.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 642611016413 in words is "six hundred forty-two billion, six hundred eleven million, sixteen thousand, four hundred thirteen".