13012511323542 has 32 divisors (see below), whose sum is σ = 26215662681600. Its totient is φ = 4305738554208.

The previous prime is 13012511323531. The next prime is 13012511323549. The reversal of 13012511323542 is 24532311521031.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012511323549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5425059 + ... + 7446897.

It is an arithmetic number, because the mean of its divisors is an integer number (819239458800).

Almost surely, 2^{13012511323542} is an apocalyptic number.

13012511323542 is an abundant number, since it is smaller than the sum of its proper divisors (13203151358058).

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

13012511323542 is a wasteful number, since it uses less digits than its factorization.

13012511323542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029700.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 13012511323542 its reverse (24532311521031), we get a palindrome (37544822844573).

The spelling of 13012511323542 in words is "thirteen trillion, twelve billion, five hundred eleven million, three hundred twenty-three thousand, five hundred forty-two".