12523501040 has 20 divisors (see below), whose sum is σ = 29117140104. Its totient is φ = 5009400384.

The previous prime is 12523501033. The next prime is 12523501049. The reversal of 12523501040 is 4010532521.

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 = 12523500997 and 12523501015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523501049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78271802 + ... + 78271961.

Almost surely, 2^12523501040 is an apocalyptic number.

12523501040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12523501040 is an abundant number, since it is smaller than the sum of its proper divisors (16593639064).

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

12523501040 is a wasteful number, since it uses less digits than its factorization.

12523501040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156543776 (or 156543770 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 12523501040 in words is "twelve billion, five hundred twenty-three million, five hundred one thousand, forty".