1656320143 has 2 divisors, whose sum is σ = 1656320144. Its totient is φ = 1656320142.

The previous prime is 1656320101. The next prime is 1656320161. The reversal of 1656320143 is 3410236561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1656320143 - 2²¹ = 1654222991 is a prime.

It is a super-2 number, since 2×1656320143² = 5486792832215080898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1656324143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 828160071 + 828160072.

It is an arithmetic number, because the mean of its divisors is an integer number (828160072).

Almost surely, 2^1656320143 is an apocalyptic number.

1656320143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1656320143 is an equidigital number, since it uses as much as digits as its factorization.

1656320143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1656320143 is about 40697.9132511730. The cubic root of 1656320143 is about 1183.1725749656.

The spelling of 1656320143 in words is "one billion, six hundred fifty-six million, three hundred twenty thousand, one hundred forty-three".