2641002561 has 24 divisors (see below), whose sum is σ = 4012160256. Its totient is φ = 1671714720.

The previous prime is 2641002523. The next prime is 2641002563. The reversal of 2641002561 is 1652001462.

It is not a de Polignac number, because 2641002561 - 2¹⁰ = 2641001537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2641002563) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 74515 + ... + 104088.

It is an arithmetic number, because the mean of its divisors is an integer number (167173344).

Almost surely, 2^2641002561 is an apocalyptic number.

It is an amenable number.

2641002561 is a deficient number, since it is larger than the sum of its proper divisors (1371157695).

2641002561 is a wasteful number, since it uses less digits than its factorization.

2641002561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178693 (or 178690 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 2641002561 is about 51390.6855470911. The cubic root of 2641002561 is about 1382.2595764064.

The spelling of 2641002561 in words is "two billion, six hundred forty-one million, two thousand, five hundred sixty-one".