2971942561 has 6 divisors (see below), whose sum is σ = 3457157730. Its totient is φ = 2547379296.

The previous prime is 2971942543. The next prime is 2971942573. The reversal of 2971942561 is 1652491792.

It can be written as a sum of positive squares in only one way, i.e., 2905210000 + 66732561 = 53900^2 + 8169^2 .

It is not a de Polignac number, because 2971942561 - 2⁷ = 2971942433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2971942541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30325896 + ... + 30325993.

It is an arithmetic number, because the mean of its divisors is an integer number (576192955).

Almost surely, 2^2971942561 is an apocalyptic number.

It is an amenable number.

2971942561 is a deficient number, since it is larger than the sum of its proper divisors (485215169).

2971942561 is an equidigital number, since it uses as much as digits as its factorization.

2971942561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60651903 (or 60651896 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 2971942561 is about 54515.5258710764. The cubic root of 2971942561 is about 1437.7392768776.

The spelling of 2971942561 in words is "two billion, nine hundred seventy-one million, nine hundred forty-two thousand, five hundred sixty-one".