123571664 has 20 divisors (see below), whose sum is σ = 240312000. Its totient is φ = 61555680.

The previous prime is 123571633. The next prime is 123571681. The reversal of 123571664 is 466175321.

It is a super-2 number, since 2×123571664² = 30539912287457792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9914 + ... + 18585.

It is an arithmetic number, because the mean of its divisors is an integer number (12015600).

Almost surely, 2^123571664 is an apocalyptic number.

It is an amenable number.

123571664 is a deficient number, since it is larger than the sum of its proper divisors (116740336).

123571664 is a wasteful number, since it uses less digits than its factorization.

123571664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28778 (or 28772 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 123571664 is about 11116.2792336285. The cubic root of 123571664 is about 498.0882517533.

It can be divided in two parts, 123 and 571664, that added together give a cube (571787 = 83³).

The spelling of 123571664 in words is "one hundred twenty-three million, five hundred seventy-one thousand, six hundred sixty-four".