2661541402624 has 72 divisors (see below), whose sum is σ = 5762641755780. Its totient is φ = 1228403564544.

The previous prime is 2661541402603. The next prime is 2661541402631. The reversal of 2661541402624 is 4262041451662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3498802 + ... + 4191025.

Almost surely, 2^{2661541402624} is an apocalyptic number.

It is an amenable number.

2661541402624 is an abundant number, since it is smaller than the sum of its proper divisors (3101100353156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661541402624 is an equidigital number, since it uses as much as digits as its factorization.

2661541402624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7689875 (or 7689842 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The spelling of 2661541402624 in words is "two trillion, six hundred sixty-one billion, five hundred forty-one million, four hundred two thousand, six hundred twenty-four".