856461770604 has 36 divisors (see below), whose sum is σ = 2361758217000. Its totient is φ = 259533869760.

The previous prime is 856461770573. The next prime is 856461770641. The reversal of 856461770604 is 406077164658.

856461770604 is a `hidden beast` number, since 8 + 56 + 461 + 7 + 70 + 60 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×856461770604² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1081390729 + ... + 1081391520.

Almost surely, 2^856461770604 is an apocalyptic number.

It is an amenable number.

856461770604 is an abundant number, since it is smaller than the sum of its proper divisors (1505296446396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856461770604 is a wasteful number, since it uses less digits than its factorization.

856461770604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162782270 (or 2162782265 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 856461770604 in words is "eight hundred fifty-six billion, four hundred sixty-one million, seven hundred seventy thousand, six hundred four".