55128610 has 16 divisors (see below), whose sum is σ = 99319032. Its totient is φ = 22032000.

The previous prime is 55128607. The next prime is 55128629. The reversal of 55128610 is 1682155.

It can be written as a sum of positive squares in 4 ways, for example, as 47238129 + 7890481 = 6873^2 + 2809^2 .

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, 16480 + ... + 19540.

Almost surely, 2^55128610 is an apocalyptic number.

55128610 is a deficient number, since it is larger than the sum of its proper divisors (44190422).

55128610 is a wasteful number, since it uses less digits than its factorization.

55128610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4869.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 55128610 is about 7424.8643085244. The cubic root of 55128610 is about 380.5914381858.

It can be divided in two parts, 551 and 28610, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 55128610 in words is "fifty-five million, one hundred twenty-eight thousand, six hundred ten".