2156975518 has 4 divisors (see below), whose sum is σ = 3235463280. Its totient is φ = 1078487758.

The previous prime is 2156975501. The next prime is 2156975533. The reversal of 2156975518 is 8155796512.

It is a semiprime because it is the product of two primes.

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, 539243878 + ... + 539243881.

It is an arithmetic number, because the mean of its divisors is an integer number (808865820).

Almost surely, 2^2156975518 is an apocalyptic number.

2156975518 is a deficient number, since it is larger than the sum of its proper divisors (1078487762).

2156975518 is a wasteful number, since it uses less digits than its factorization.

2156975518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078487761.

The product of its digits is 756000, while the sum is 49.

The square root of 2156975518 is about 46443.2505107039. The cubic root of 2156975518 is about 1292.0571943325.

The spelling of 2156975518 in words is "two billion, one hundred fifty-six million, nine hundred seventy-five thousand, five hundred eighteen".