1656272543 has 4 divisors (see below), whose sum is σ = 1662429960. Its totient is φ = 1650115128.

The previous prime is 1656272533. The next prime is 1656272561. The reversal of 1656272543 is 3452726561.

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

It is a cyclic number.

It is not a de Polignac number, because 1656272543 - 2⁶ = 1656272479 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1656272543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656272533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3078305 + ... + 3078842.

It is an arithmetic number, because the mean of its divisors is an integer number (415607490).

Almost surely, 2^1656272543 is an apocalyptic number.

1656272543 is a deficient number, since it is larger than the sum of its proper divisors (6157417).

1656272543 is an equidigital number, since it uses as much as digits as its factorization.

1656272543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6157416.

The product of its digits is 302400, while the sum is 41.

The square root of 1656272543 is about 40697.3284504032. The cubic root of 1656272543 is about 1183.1612406926.

The spelling of 1656272543 in words is "one billion, six hundred fifty-six million, two hundred seventy-two thousand, five hundred forty-three".