15120145405511 has 4 divisors (see below), whose sum is σ = 15126609771000. Its totient is φ = 15113681040024.

The previous prime is 15120145405501. The next prime is 15120145405513. The reversal of 15120145405511 is 11550454102151.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15120145405511 is a prime.

It is a super-2 number, since 2×15120145405511² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15120145405513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3232179236 + ... + 3232183913.

It is an arithmetic number, because the mean of its divisors is an integer number (3781652442750).

Almost surely, 2^{15120145405511} is an apocalyptic number.

15120145405511 is a deficient number, since it is larger than the sum of its proper divisors (6464365489).

15120145405511 is an equidigital number, since it uses as much as digits as its factorization.

15120145405511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6464365488.

The product of its (nonzero) digits is 20000, while the sum is 35.

Adding to 15120145405511 its reverse (11550454102151), we get a palindrome (26670599507662).

The spelling of 15120145405511 in words is "fifteen trillion, one hundred twenty billion, one hundred forty-five million, four hundred five thousand, five hundred eleven".