2661254564 has 48 divisors (see below), whose sum is σ = 4817150016. Its totient is φ = 1285891200.

The previous prime is 2661254549. The next prime is 2661254573. The reversal of 2661254564 is 4654521662.

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 15 ways as a sum of consecutive naturals, for example, 6703214 + ... + 6703610.

It is an arithmetic number, because the mean of its divisors is an integer number (100357292).

Almost surely, 2^2661254564 is an apocalyptic number.

It is an amenable number.

2661254564 is a deficient number, since it is larger than the sum of its proper divisors (2155895452).

2661254564 is a wasteful number, since it uses less digits than its factorization.

2661254564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876 (or 874 counting only the distinct ones).

The product of its digits is 345600, while the sum is 41.

The square root of 2661254564 is about 51587.3488754753. The cubic root of 2661254564 is about 1385.7837777235.

The spelling of 2661254564 in words is "two billion, six hundred sixty-one million, two hundred fifty-four thousand, five hundred sixty-four".