123651616 has 48 divisors (see below), whose sum is σ = 268621920. Its totient is φ = 55559680.

The previous prime is 123651607. The next prime is 123651629. The reversal of 123651616 is 616156321.

It is a super-2 number, since 2×123651616² = 30579444278822912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29355 + ... + 33301.

It is an arithmetic number, because the mean of its divisors is an integer number (5596290).

Almost surely, 2^123651616 is an apocalyptic number.

123651616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123651616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134310960).

123651616 is an abundant number, since it is smaller than the sum of its proper divisors (144970304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123651616 is a wasteful number, since it uses less digits than its factorization.

123651616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4057 (or 4049 counting only the distinct ones).

The product of its digits is 6480, while the sum is 31.

The square root of 123651616 is about 11119.8748194393. The cubic root of 123651616 is about 498.1956511496.

The spelling of 123651616 in words is "one hundred twenty-three million, six hundred fifty-one thousand, six hundred sixteen".