2913966561 has 32 divisors (see below), whose sum is σ = 4358688768. Its totient is φ = 1716085440.

The previous prime is 2913966557. The next prime is 2913966563. The reversal of 2913966561 is 1656693192.

It is a happy number.

It is not a de Polignac number, because 2913966561 - 2² = 2913966557 is a prime.

It is a super-2 number, since 2×2913966561² = 16982402237252333442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2913966561.

It is not an unprimeable number, because it can be changed into a prime (2913966563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1858800 + ... + 1860366.

It is an arithmetic number, because the mean of its divisors is an integer number (136209024).

Almost surely, 2^2913966561 is an apocalyptic number.

It is an amenable number.

2913966561 is a deficient number, since it is larger than the sum of its proper divisors (1444722207).

2913966561 is a wasteful number, since it uses less digits than its factorization.

2913966561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3141.

The product of its digits is 524880, while the sum is 48.

The square root of 2913966561 is about 53981.1685775697. The cubic root of 2913966561 is about 1428.3287827994.

The spelling of 2913966561 in words is "two billion, nine hundred thirteen million, nine hundred sixty-six thousand, five hundred sixty-one".