3121576461 has 20 divisors (see below), whose sum is σ = 4674889692. Its totient is φ = 2075787648.

The previous prime is 3121576429. The next prime is 3121576483. The reversal of 3121576461 is 1646751213.

3121576461 is a `hidden beast` number, since 3 + 1 + 2 + 1 + 5 + 7 + 646 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2513016900 + 608559561 = 50130^2 + 24669^2 .

It is not a de Polignac number, because 3121576461 - 2⁵ = 3121576429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121576421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16380 + ... + 80693.

Almost surely, 2^3121576461 is an apocalyptic number.

It is an amenable number.

3121576461 is a deficient number, since it is larger than the sum of its proper divisors (1553313231).

3121576461 is an equidigital number, since it uses as much as digits as its factorization.

3121576461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97482 (or 97473 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 3121576461 is about 55871.0699825947. The cubic root of 3121576461 is about 1461.4747812880.

The spelling of 3121576461 in words is "three billion, one hundred twenty-one million, five hundred seventy-six thousand, four hundred sixty-one".