2979276561 has 24 divisors (see below), whose sum is σ = 4417171200. Its totient is φ = 1934102016.

The previous prime is 2979276533. The next prime is 2979276563. The reversal of 2979276561 is 1656729792.

2979276561 is a `hidden beast` number, since 2 + 9 + 7 + 9 + 2 + 76 + 561 = 666.

It is not a de Polignac number, because 2979276561 - 2⁶ = 2979276497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2979276498 and 2979276507.

It is not an unprimeable number, because it can be changed into a prime (2979276563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66481 + ... + 101873.

It is an arithmetic number, because the mean of its divisors is an integer number (184048800).

Almost surely, 2^2979276561 is an apocalyptic number.

It is an amenable number.

2979276561 is a deficient number, since it is larger than the sum of its proper divisors (1437894639).

2979276561 is a wasteful number, since it uses less digits than its factorization.

2979276561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35645 (or 35642 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 54.

The square root of 2979276561 is about 54582.7496650728. The cubic root of 2979276561 is about 1438.9209639273.

The spelling of 2979276561 in words is "two billion, nine hundred seventy-nine million, two hundred seventy-six thousand, five hundred sixty-one".