642453354246 has 128 divisors (see below), whose sum is σ = 1528472332800. Its totient is φ = 177914880000.

The previous prime is 642453354187. The next prime is 642453354331.

642453354246 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 642453354195 and 642453354204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4505646 + ... + 4646046.

It is an arithmetic number, because the mean of its divisors is an integer number (11941190100).

Almost surely, 2^642453354246 is an apocalyptic number.

642453354246 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 642453354246, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764236166400).

642453354246 is an abundant number, since it is smaller than the sum of its proper divisors (886018978554).

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

642453354246 is a wasteful number, since it uses less digits than its factorization.

642453354246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140566.

The product of its digits is 8294400, while the sum is 48.

It can be divided in two parts, 642453 and 354246, that added together give a palindrome (996699).

The spelling of 642453354246 in words is "six hundred forty-two billion, four hundred fifty-three million, three hundred fifty-four thousand, two hundred forty-six".