2555551616 has 16 divisors (see below), whose sum is σ = 5091138240. Its totient is φ = 1277775744.

The previous prime is 2555551589. The next prime is 2555551667. The reversal of 2555551616 is 6161555552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×2555551616² = 13061688124080422912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9982496 + ... + 9982751.

It is an arithmetic number, because the mean of its divisors is an integer number (318196140).

Almost surely, 2^2555551616 is an apocalyptic number.

It is an amenable number.

2555551616 is a deficient number, since it is larger than the sum of its proper divisors (2535586624).

2555551616 is an equidigital number, since it uses as much as digits as its factorization.

2555551616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19965261 (or 19965249 counting only the distinct ones).

The product of its digits is 225000, while the sum is 41.

The square root of 2555551616 is about 50552.4639953385. The cubic root of 2555551616 is about 1367.1879406969.

The spelling of 2555551616 in words is "two billion, five hundred fifty-five million, five hundred fifty-one thousand, six hundred sixteen".