851663464 has 16 divisors (see below), whose sum is σ = 1603726020. Its totient is φ = 424003200.

The previous prime is 851663441. The next prime is 851663471. The reversal of 851663464 is 464366158.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 831860964 + 19802500 = 28842^2 + 4450^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 851663464.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226587 + ... + 230314.

Almost surely, 2^851663464 is an apocalyptic number.

It is an amenable number.

851663464 is a deficient number, since it is larger than the sum of its proper divisors (752062556).

851663464 is a wasteful number, since it uses less digits than its factorization.

851663464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457140 (or 457136 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 851663464 is about 29183.2737025852. The cubic root of 851663464 is about 947.8857743649.

The spelling of 851663464 in words is "eight hundred fifty-one million, six hundred sixty-three thousand, four hundred sixty-four".