123595549056 has 480 divisors, whose sum is σ = 430271000280. Its totient is φ = 35115171840.

The previous prime is 123595549019. The next prime is 123595549057. The reversal of 123595549056 is 650945595321.

123595549056 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 95 + 549 + 0 + 5 + 6 = 666.

It is a super-2 number, since 2×123595549056² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 123595548993 and 123595549011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123595549057) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 107194176 + ... + 107195328.

Almost surely, 2^123595549056 is an apocalyptic number.

123595549056 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 123595549056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215135500140).

123595549056 is an abundant number, since it is smaller than the sum of its proper divisors (306675451224).

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

123595549056 is a wasteful number, since it uses less digits than its factorization.

123595549056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1376 counting only the distinct ones).

The product of its (nonzero) digits is 7290000, while the sum is 54.

The spelling of 123595549056 in words is "one hundred twenty-three billion, five hundred ninety-five million, five hundred forty-nine thousand, fifty-six".