40123255120 has 80 divisors (see below), whose sum is σ = 100494817920. Its totient is φ = 14809969152.

The previous prime is 40123255079. The next prime is 40123255121. The reversal of 40123255120 is 2155232104.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40123255121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6306501 + ... + 6312859.

It is an arithmetic number, because the mean of its divisors is an integer number (1256185224).

Almost surely, 2^40123255120 is an apocalyptic number.

40123255120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40123255120 is an abundant number, since it is smaller than the sum of its proper divisors (60371562800).

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

40123255120 is a wasteful number, since it uses less digits than its factorization.

40123255120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12452 (or 12446 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 40123255120 its reverse (2155232104), we get a palindrome (42278487224).

The spelling of 40123255120 in words is "forty billion, one hundred twenty-three million, two hundred fifty-five thousand, one hundred twenty".