642611602041 has 16 divisors (see below), whose sum is σ = 908038957824. Its totient is φ = 402841689344.

The previous prime is 642611602037. The next prime is 642611602091. The reversal of 642611602041 is 140206116246.

It is a cyclic number.

It is not a de Polignac number, because 642611602041 - 2² = 642611602037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 642611601993 and 642611602011.

It is not an unprimeable number, because it can be changed into a prime (642611602091) 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, 5655546 + ... + 5768051.

It is an arithmetic number, because the mean of its divisors is an integer number (56752434864).

Almost surely, 2^642611602041 is an apocalyptic number.

It is an amenable number.

642611602041 is a deficient number, since it is larger than the sum of its proper divisors (265427355783).

642611602041 is a wasteful number, since it uses less digits than its factorization.

642611602041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11424720.

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 642611602041 its reverse (140206116246), we get a palindrome (782817718287).

The spelling of 642611602041 in words is "six hundred forty-two billion, six hundred eleven million, six hundred two thousand, forty-one".