1656671423 has 8 divisors (see below), whose sum is σ = 1811456976. Its totient is φ = 1502582400.

The previous prime is 1656671407. The next prime is 1656671431. The reversal of 1656671423 is 3241766561.

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

It is not a de Polignac number, because 1656671423 - 2⁴ = 1656671407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1656671483) 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, 169148 + ... + 178673.

It is an arithmetic number, because the mean of its divisors is an integer number (226432122).

Almost surely, 2^1656671423 is an apocalyptic number.

1656671423 is a deficient number, since it is larger than the sum of its proper divisors (154785553).

1656671423 is a wasteful number, since it uses less digits than its factorization.

1656671423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348265.

The product of its digits is 181440, while the sum is 41.

The square root of 1656671423 is about 40702.2287227616. The cubic root of 1656671423 is about 1183.2562132817.

The spelling of 1656671423 in words is "one billion, six hundred fifty-six million, six hundred seventy-one thousand, four hundred twenty-three".