123261525040 has 20 divisors (see below), whose sum is σ = 286583045904. Its totient is φ = 49304609984.

The previous prime is 123261525029. The next prime is 123261525097. The reversal of 123261525040 is 40525162321.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 123261524993 and 123261525011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 770384452 + ... + 770384611.

Almost surely, 2^123261525040 is an apocalyptic number.

123261525040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123261525040 is an abundant number, since it is smaller than the sum of its proper divisors (163321520864).

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

123261525040 is a wasteful number, since it uses less digits than its factorization.

123261525040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540769076 (or 1540769070 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 123261525040 its reverse (40525162321), we get a palindrome (163786687361).

The spelling of 123261525040 in words is "one hundred twenty-three billion, two hundred sixty-one million, five hundred twenty-five thousand, forty".