11515321551142 has 4 divisors (see below), whose sum is σ = 17272982326716. Its totient is φ = 5757660775570.

The previous prime is 11515321551091. The next prime is 11515321551161. The reversal of 11515321551142 is 24115512351511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2878830387784 + ... + 2878830387787.

It is an arithmetic number, because the mean of its divisors is an integer number (4318245581679).

Almost surely, 2^{11515321551142} is an apocalyptic number.

11515321551142 is a deficient number, since it is larger than the sum of its proper divisors (5757660775574).

11515321551142 is an equidigital number, since it uses as much as digits as its factorization.

11515321551142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5757660775573.

The product of its digits is 30000, while the sum is 37.

The spelling of 11515321551142 in words is "eleven trillion, five hundred fifteen billion, three hundred twenty-one million, five hundred fifty-one thousand, one hundred forty-two".