642653481063 has 16 divisors (see below), whose sum is σ = 934908768000. Its totient is φ = 389428596480.

The previous prime is 642653481049. The next prime is 642653481073. The reversal of 642653481063 is 360184356246.

It is not a de Polignac number, because 642653481063 - 2¹⁰ = 642653480039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642653481073) 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, 1234963 + ... + 1676436.

It is an arithmetic number, because the mean of its divisors is an integer number (58431798000).

Almost surely, 2^642653481063 is an apocalyptic number.

642653481063 is a deficient number, since it is larger than the sum of its proper divisors (292255286937).

642653481063 is a wasteful number, since it uses less digits than its factorization.

642653481063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918102.

The product of its (nonzero) digits is 2488320, while the sum is 48.

The spelling of 642653481063 in words is "six hundred forty-two billion, six hundred fifty-three million, four hundred eighty-one thousand, sixty-three".