2661543928 has 8 divisors (see below), whose sum is σ = 4990394880. Its totient is φ = 1330771960.

The previous prime is 2661543889. The next prime is 2661543943. The reversal of 2661543928 is 8293451662.

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166346488 + ... + 166346503.

It is an arithmetic number, because the mean of its divisors is an integer number (623799360).

Almost surely, 2^2661543928 is an apocalyptic number.

It is an amenable number.

2661543928 is a deficient number, since it is larger than the sum of its proper divisors (2328850952).

2661543928 is a wasteful number, since it uses less digits than its factorization.

2661543928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332692997 (or 332692993 counting only the distinct ones).

The product of its digits is 622080, while the sum is 46.

The square root of 2661543928 is about 51590.1534015940. The cubic root of 2661543928 is about 1385.8340023318.

The spelling of 2661543928 in words is "two billion, six hundred sixty-one million, five hundred forty-three thousand, nine hundred twenty-eight".