1021656163 has 16 divisors (see below), whose sum is σ = 1201818240. Its totient is φ = 858427200.

The previous prime is 1021656149. The next prime is 1021656169. The reversal of 1021656163 is 3616561201.

It is a cyclic number.

It is not a de Polignac number, because 1021656163 - 2⁹ = 1021655651 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021656169) 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 15 ways as a sum of consecutive naturals, for example, 51045 + ... + 68182.

It is an arithmetic number, because the mean of its divisors is an integer number (75113640).

Almost surely, 2^1021656163 is an apocalyptic number.

1021656163 is a deficient number, since it is larger than the sum of its proper divisors (180162077).

1021656163 is a wasteful number, since it uses less digits than its factorization.

1021656163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119298.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 1021656163 is about 31963.3565665435. The cubic root of 1021656163 is about 1007.1672291021.

The spelling of 1021656163 in words is "one billion, twenty-one million, six hundred fifty-six thousand, one hundred sixty-three".