2661254556 has 24 divisors (see below), whose sum is σ = 6210625680. Its totient is φ = 886937472.

The previous prime is 2661254549. The next prime is 2661254573. The reversal of 2661254556 is 6554521662.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76290 + ... + 105558.

It is an arithmetic number, because the mean of its divisors is an integer number (258776070).

Almost surely, 2^2661254556 is an apocalyptic number.

It is an amenable number.

2661254556 is an abundant number, since it is smaller than the sum of its proper divisors (3549371124).

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

2661254556 is a wasteful number, since it uses less digits than its factorization.

2661254556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36853 (or 36851 counting only the distinct ones).

The product of its digits is 432000, while the sum is 42.

The square root of 2661254556 is about 51587.3487979369. The cubic root of 2661254556 is about 1385.7837763349.

The spelling of 2661254556 in words is "two billion, six hundred sixty-one million, two hundred fifty-four thousand, five hundred fifty-six".