123687783664 has 20 divisors (see below), whose sum is σ = 246121976104. Its totient is φ = 60172435008.

The previous prime is 123687783649. The next prime is 123687783679. The reversal of 123687783664 is 466387786321.

It is an interprime number because it is at equal distance from previous prime (123687783649) and next prime (123687783679).

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, 104465442 + ... + 104466625.

Almost surely, 2^123687783664 is an apocalyptic number.

It is an amenable number.

123687783664 is a deficient number, since it is larger than the sum of its proper divisors (122434192440).

123687783664 is a wasteful number, since it uses less digits than its factorization.

123687783664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208932112 (or 208932106 counting only the distinct ones).

The product of its digits is 48771072, while the sum is 61.

The spelling of 123687783664 in words is "one hundred twenty-three billion, six hundred eighty-seven million, seven hundred eighty-three thousand, six hundred sixty-four".