1656644147 has 8 divisors (see below), whose sum is σ = 1662309216. Its totient is φ = 1650989952.

The previous prime is 1656644137. The next prime is 1656644173. The reversal of 1656644147 is 7414466561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1656644147 - 2²⁴ = 1639866931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1656644098 and 1656644107.

It is not an unprimeable number, because it can be changed into a prime (1656644107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394523 + ... + 398699.

It is an arithmetic number, because the mean of its divisors is an integer number (207788652).

Almost surely, 2^1656644147 is an apocalyptic number.

1656644147 is a deficient number, since it is larger than the sum of its proper divisors (5665069).

1656644147 is an equidigital number, since it uses as much as digits as its factorization.

1656644147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437.

The product of its digits is 483840, while the sum is 44.

The square root of 1656644147 is about 40701.8936537356. The cubic root of 1656644147 is about 1183.2497194022.

The spelling of 1656644147 in words is "one billion, six hundred fifty-six million, six hundred forty-four thousand, one hundred forty-seven".