642412441650 has 96 divisors (see below), whose sum is σ = 1823937724800. Its totient is φ = 146582507520.

The previous prime is 642412441637. The next prime is 642412441667. The reversal of 642412441650 is 56144214246.

It is a junction number, because it is equal to n+sod(n) for n = 642412441599 and 642412441608.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75676 + ... + 1136024.

It is an arithmetic number, because the mean of its divisors is an integer number (18999351300).

Almost surely, 2^642412441650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642412441650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (911968862400).

642412441650 is an abundant number, since it is smaller than the sum of its proper divisors (1181525283150).

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

642412441650 is a wasteful number, since it uses less digits than its factorization.

642412441650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060948 (or 1060943 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 39.

Adding to 642412441650 its reverse (56144214246), we get a palindrome (698556655896).

The spelling of 642412441650 in words is "six hundred forty-two billion, four hundred twelve million, four hundred forty-one thousand, six hundred fifty".