2156528862 has 24 divisors (see below), whose sum is σ = 4781143224. Its totient is φ = 702125424.

The previous prime is 2156528851. The next prime is 2156528879. The reversal of 2156528862 is 2688256512.

It is a happy number.

2156528862 is a `hidden beast` number, since 2 + 1 + 565 + 2 + 8 + 86 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1392333 + ... + 1393880.

It is an arithmetic number, because the mean of its divisors is an integer number (199214301).

Almost surely, 2^2156528862 is an apocalyptic number.

2156528862 is an abundant number, since it is smaller than the sum of its proper divisors (2624614362).

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

2156528862 is a wasteful number, since it uses less digits than its factorization.

2156528862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2786264 (or 2786261 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 2156528862 is about 46438.4416405202. The cubic root of 2156528862 is about 1291.9680038692.

The spelling of 2156528862 in words is "two billion, one hundred fifty-six million, five hundred twenty-eight thousand, eight hundred sixty-two".