642453643246 has 8 divisors (see below), whose sum is σ = 964468432944. Its totient is φ = 320964165600.

The previous prime is 642453643241. The next prime is 642453643309. The reversal of 642453643246 is 642346354246.

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

It is a self number, because there is not a number n which added to its sum of digits gives 642453643246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642453643241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131324955 + ... + 131329846.

It is an arithmetic number, because the mean of its divisors is an integer number (120558554118).

Almost surely, 2^642453643246 is an apocalyptic number.

642453643246 is a deficient number, since it is larger than the sum of its proper divisors (322014789698).

642453643246 is a wasteful number, since it uses less digits than its factorization.

642453643246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262656026.

The product of its digits is 9953280, while the sum is 49.

The spelling of 642453643246 in words is "six hundred forty-two billion, four hundred fifty-three million, six hundred forty-three thousand, two hundred forty-six".