123040995840 has 1600 divisors, whose sum is σ = 541872460800. Its totient is φ = 26085556224.

The previous prime is 123040995827. The next prime is 123040995881. The reversal of 123040995840 is 48599040321.

123040995840 is a `hidden beast` number, since 1 + 23 + 0 + 40 + 9 + 9 + 584 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1557480921 + ... + 1557480999.

It is an arithmetic number, because the mean of its divisors is an integer number (338670288).

Almost surely, 2^123040995840 is an apocalyptic number.

123040995840 is a gapful number since it is divisible by the number (10) 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 123040995840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270936230400).

123040995840 is an abundant number, since it is smaller than the sum of its proper divisors (418831464960).

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

123040995840 is an equidigital number, since it uses as much as digits as its factorization.

123040995840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 123040995840 in words is "one hundred twenty-three billion, forty million, nine hundred ninety-five thousand, eight hundred forty".