642051007051 has 8 divisors (see below), whose sum is σ = 650150893440. Its totient is φ = 633970805952.

The previous prime is 642051007021. The next prime is 642051007057. The reversal of 642051007051 is 150700150246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 642051007051 - 2²³ = 642042618443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (642051007057) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4855675 + ... + 4986148.

It is an arithmetic number, because the mean of its divisors is an integer number (81268861680).

Almost surely, 2^642051007051 is an apocalyptic number.

642051007051 is a deficient number, since it is larger than the sum of its proper divisors (8099886389).

642051007051 is an equidigital number, since it uses as much as digits as its factorization.

642051007051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9842645.

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 642051007051 its reverse (150700150246), we get a palindrome (792751157297).

The spelling of 642051007051 in words is "six hundred forty-two billion, fifty-one million, seven thousand, fifty-one".