684834462945 has 12 divisors (see below), whose sum is σ = 1187046402516. Its totient is φ = 365245046880.

The previous prime is 684834462931. The next prime is 684834462947. The reversal of 684834462945 is 549264438486.

It is a happy number.

684834462945 is a `hidden beast` number, since 6 + 8 + 4 + 83 + 4 + 462 + 94 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 221922961569 + 462911501376 = 471087^2 + 680376^2 .

It is not a de Polignac number, because 684834462945 - 2⁷ = 684834462817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684834462947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7609271766 + ... + 7609271855.

It is an arithmetic number, because the mean of its divisors is an integer number (98920533543).

Almost surely, 2^684834462945 is an apocalyptic number.

It is an amenable number.

684834462945 is a deficient number, since it is larger than the sum of its proper divisors (502211939571).

684834462945 is a wasteful number, since it uses less digits than its factorization.

684834462945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15218543632 (or 15218543629 counting only the distinct ones).

The product of its digits is 159252480, while the sum is 63.

The spelling of 684834462945 in words is "six hundred eighty-four billion, eight hundred thirty-four million, four hundred sixty-two thousand, nine hundred forty-five".