642662405130 has 64 divisors (see below), whose sum is σ = 1634732057088. Its totient is φ = 161136307200.

The previous prime is 642662405117. The next prime is 642662405131. The reversal of 642662405130 is 31504266246.

It is not an unprimeable number, because it can be changed into a prime (642662405131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105346 + ... + 1138605.

It is an arithmetic number, because the mean of its divisors is an integer number (25542688392).

Almost surely, 2^642662405130 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642662405130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (817366028544).

642662405130 is an abundant number, since it is smaller than the sum of its proper divisors (992069651958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642662405130 is a wasteful number, since it uses less digits than its factorization.

642662405130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1244991.

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 642662405130 in words is "six hundred forty-two billion, six hundred sixty-two million, four hundred five thousand, one hundred thirty".