12505454140 has 12 divisors (see below), whose sum is σ = 26261453736. Its totient is φ = 5002181648.

The previous prime is 12505454083. The next prime is 12505454149. The reversal of 12505454140 is 4145450521.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12505454149) 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, 312636334 + ... + 312636373.

It is an arithmetic number, because the mean of its divisors is an integer number (2188454478).

Almost surely, 2^12505454140 is an apocalyptic number.

12505454140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12505454140 is an abundant number, since it is smaller than the sum of its proper divisors (13755999596).

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

12505454140 is a wasteful number, since it uses less digits than its factorization.

12505454140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625272716 (or 625272714 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 31.

The spelling of 12505454140 in words is "twelve billion, five hundred five million, four hundred fifty-four thousand, one hundred forty".