12523553740 has 24 divisors (see below), whose sum is σ = 26310472272. Its totient is φ = 5007324480.

The previous prime is 12523553729. The next prime is 12523553741. The reversal of 12523553740 is 4735532521.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12523553740.

It is not an unprimeable number, because it can be changed into a prime (12523553741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81639 + ... + 178078.

It is an arithmetic number, because the mean of its divisors is an integer number (1096269678).

Almost surely, 2^12523553740 is an apocalyptic number.

12523553740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12523553740 is an abundant number, since it is smaller than the sum of its proper divisors (13786918532).

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

12523553740 is a wasteful number, since it uses less digits than its factorization.

12523553740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262137 (or 262135 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 37.

The spelling of 12523553740 in words is "twelve billion, five hundred twenty-three million, five hundred fifty-three thousand, seven hundred forty".