856477184648 has 8 divisors (see below), whose sum is σ = 1605894721230. Its totient is φ = 428238592320.

The previous prime is 856477184561. The next prime is 856477184663. The reversal of 856477184648 is 846481774658.

It can be written as a sum of positive squares in only one way, i.e., 804612588004 + 51864596644 = 897002^2 + 227738^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53529824033 + ... + 53529824048.

Almost surely, 2^856477184648 is an apocalyptic number.

It is an amenable number.

856477184648 is a deficient number, since it is larger than the sum of its proper divisors (749417536582).

856477184648 is a wasteful number, since it uses less digits than its factorization.

856477184648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107059648087 (or 107059648083 counting only the distinct ones).

The product of its digits is 289013760, while the sum is 68.

The spelling of 856477184648 in words is "eight hundred fifty-six billion, four hundred seventy-seven million, one hundred eighty-four thousand, six hundred forty-eight".