642611053 has 16 divisors (see below), whose sum is σ = 767704320. Its totient is φ = 525926016.

The previous prime is 642611023. The next prime is 642611089. The reversal of 642611053 is 350116246.

It is not a de Polignac number, because 642611053 - 2¹³ = 642602861 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 (642611023) 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, 96103 + ... + 102571.

It is an arithmetic number, because the mean of its divisors is an integer number (47981520).

Almost surely, 2^642611053 is an apocalyptic number.

It is an amenable number.

642611053 is a deficient number, since it is larger than the sum of its proper divisors (125093267).

642611053 is a wasteful number, since it uses less digits than its factorization.

642611053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7116.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 642611053 is about 25349.7742199018. The cubic root of 642611053 is about 862.9442323496.

Adding to 642611053 its reverse (350116246), we get a palindrome (992727299).

The spelling of 642611053 in words is "six hundred forty-two million, six hundred eleven thousand, fifty-three".