123601646256 has 160 divisors (see below), whose sum is σ = 355650570240. Its totient is φ = 36673689600.

The previous prime is 123601646239. The next prime is 123601646269. The reversal of 123601646256 is 652646106321.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7173780 + ... + 7190988.

It is an arithmetic number, because the mean of its divisors is an integer number (2222816064).

Almost surely, 2^123601646256 is an apocalyptic number.

123601646256 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 123601646256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177825285120).

123601646256 is an abundant number, since it is smaller than the sum of its proper divisors (232048923984).

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

123601646256 is a wasteful number, since it uses less digits than its factorization.

123601646256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17515 (or 17509 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 123601646256 in words is "one hundred twenty-three billion, six hundred one million, six hundred forty-six thousand, two hundred fifty-six".