851606450 has 18 divisors (see below), whose sum is σ = 1584371901. Its totient is φ = 340560040.

The previous prime is 851606423. The next prime is 851606453. The reversal of 851606450 is 54606158.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 834574321 + 17032129 = 28889^2 + 4127^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=20635.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 851606450.

It is not an unprimeable number, because it can be changed into a prime (851606453) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 204287 + ... + 208413.

Almost surely, 2^851606450 is an apocalyptic number.

851606450 is a deficient number, since it is larger than the sum of its proper divisors (732765451).

851606450 is an frugal number, since it uses more digits than its factorization.

851606450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8266 (or 4134 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 851606450 is about 29182.2968595688. The cubic root of 851606450 is about 947.8646220483.

Multiplying 851606450 by its product of nonzero digits (28800), we get a square (24526265760000 = 4952400²).

The spelling of 851606450 in words is "eight hundred fifty-one million, six hundred six thousand, four hundred fifty".