812651464 has 8 divisors (see below), whose sum is σ = 1523721510. Its totient is φ = 406325728.

The previous prime is 812651449. The next prime is 812651473. The reversal of 812651464 is 464156218.

It can be written as a sum of positive squares in only one way, i.e., 681732100 + 130919364 = 26110^2 + 11442^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50790709 + ... + 50790724.

Almost surely, 2^812651464 is an apocalyptic number.

It is an amenable number.

812651464 is a deficient number, since it is larger than the sum of its proper divisors (711070046).

812651464 is a wasteful number, since it uses less digits than its factorization.

812651464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101581439 (or 101581435 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 812651464 is about 28507.0423579859. The cubic root of 812651464 is about 933.1857693011.

The spelling of 812651464 in words is "eight hundred twelve million, six hundred fifty-one thousand, four hundred sixty-four".