4812687231561 has 48 divisors (see below), whose sum is σ = 7845650635200. Its totient is φ = 2913562491840.

The previous prime is 4812687231557. The next prime is 4812687231577. The reversal of 4812687231561 is 1651327862184.

It is a happy number.

4812687231561 is a `hidden beast` number, since 4 + 8 + 1 + 2 + 6 + 8 + 72 + 3 + 1 + 561 = 666.

It is not a de Polignac number, because 4812687231561 - 2² = 4812687231557 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4812687231498 and 4812687231507.

It is not an unprimeable number, because it can be changed into a prime (4812687231511) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2151085 + ... + 3775253.

It is an arithmetic number, because the mean of its divisors is an integer number (163451054900).

Almost surely, 2^{4812687231561} is an apocalyptic number.

It is an amenable number.

4812687231561 is a deficient number, since it is larger than the sum of its proper divisors (3032963403639).

4812687231561 is a wasteful number, since it uses less digits than its factorization.

4812687231561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625107 (or 1625090 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 4812687231561 in words is "four trillion, eight hundred twelve billion, six hundred eighty-seven million, two hundred thirty-one thousand, five hundred sixty-one".