2156609530 has 16 divisors (see below), whose sum is σ = 3972174624. Its totient is φ = 842582160.

The previous prime is 2156609453. The next prime is 2156609531. The reversal of 2156609530 is 359066512.

It is a self number, because there is not a number n which added to its sum of digits gives 2156609530.

It is not an unprimeable number, because it can be changed into a prime (2156609531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2507256 + ... + 2508115.

It is an arithmetic number, because the mean of its divisors is an integer number (248260914).

Almost surely, 2^2156609530 is an apocalyptic number.

2156609530 is a deficient number, since it is larger than the sum of its proper divisors (1815565094).

2156609530 is a wasteful number, since it uses less digits than its factorization.

2156609530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5015421.

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 2156609530 is about 46439.3101800619. The cubic root of 2156609530 is about 1291.9841129627.

The spelling of 2156609530 in words is "two billion, one hundred fifty-six million, six hundred nine thousand, five hundred thirty".