12540265384734 has 48 divisors (see below), whose sum is σ = 27789904913472. Its totient is φ = 4085071248384.

The previous prime is 12540265384681. The next prime is 12540265384739. The reversal of 12540265384734 is 43748356204521.

12540265384734 is a `hidden beast` number, since 1 + 2 + 5 + 40 + 26 + 538 + 47 + 3 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12540265384739) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10443279 + ... + 11581994.

It is an arithmetic number, because the mean of its divisors is an integer number (578956352364).

Almost surely, 2^{12540265384734} is an apocalyptic number.

12540265384734 is an abundant number, since it is smaller than the sum of its proper divisors (15249639528738).

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

12540265384734 is a wasteful number, since it uses less digits than its factorization.

12540265384734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22026001 (or 22025998 counting only the distinct ones).

The product of its (nonzero) digits is 19353600, while the sum is 54.

The spelling of 12540265384734 in words is "twelve trillion, five hundred forty billion, two hundred sixty-five million, three hundred eighty-four thousand, seven hundred thirty-four".