2603972561 has 16 divisors (see below), whose sum is σ = 2678946816. Its totient is φ = 2530331136.

The previous prime is 2603972551. The next prime is 2603972593. The reversal of 2603972561 is 1652793062.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2603972561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2603972551) 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 15 ways as a sum of consecutive naturals, for example, 1675961 + ... + 1677513.

It is an arithmetic number, because the mean of its divisors is an integer number (167434176).

Almost surely, 2^2603972561 is an apocalyptic number.

It is an amenable number.

2603972561 is a deficient number, since it is larger than the sum of its proper divisors (74974255).

2603972561 is a wasteful number, since it uses less digits than its factorization.

2603972561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 2603972561 is about 51029.1344331843. The cubic root of 2603972561 is about 1375.7688369746.

The spelling of 2603972561 in words is "two billion, six hundred three million, nine hundred seventy-two thousand, five hundred sixty-one".