850663642 has 8 divisors (see below), whose sum is σ = 1276298100. Its totient is φ = 425230944.

The previous prime is 850663631. The next prime is 850663643. The reversal of 850663642 is 246366058.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 715616001 + 135047641 = 26751^2 + 11621^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 850663595 and 850663604.

It is not an unprimeable number, because it can be changed into a prime (850663643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39417 + ... + 57052.

Almost surely, 2^850663642 is an apocalyptic number.

850663642 is a deficient number, since it is larger than the sum of its proper divisors (425634458).

850663642 is a wasteful number, since it uses less digits than its factorization.

850663642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100880.

The product of its (nonzero) digits is 207360, while the sum is 40.

The square root of 850663642 is about 29166.1386199819. The cubic root of 850663642 is about 947.5147012847.

The spelling of 850663642 in words is "eight hundred fifty million, six hundred sixty-three thousand, six hundred forty-two".