642661143350 has 48 divisors (see below), whose sum is σ = 1218448889280. Its totient is φ = 252101241600.

The previous prime is 642661143337. The next prime is 642661143359. The reversal of 642661143350 is 53341166246.

642661143350 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 642661143298 and 642661143307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642661143359) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5991491 + ... + 6097809.

It is an arithmetic number, because the mean of its divisors is an integer number (25384351860).

Almost surely, 2^642661143350 is an apocalyptic number.

642661143350 is a deficient number, since it is larger than the sum of its proper divisors (575787745930).

642661143350 is a wasteful number, since it uses less digits than its factorization.

642661143350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108665 (or 108660 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 642661143350 in words is "six hundred forty-two billion, six hundred sixty-one million, one hundred forty-three thousand, three hundred fifty".