15164556121 has 32 divisors (see below), whose sum is σ = 19683917568. Its totient is φ = 11456163840.

The previous prime is 15164556109. The next prime is 15164556131. The reversal of 15164556121 is 12165546151.

15164556121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15164556121 - 2⁷ = 15164555993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15164556131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79696 + ... + 191521.

It is an arithmetic number, because the mean of its divisors is an integer number (615122424).

Almost surely, 2^15164556121 is an apocalyptic number.

15164556121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

15164556121 is a deficient number, since it is larger than the sum of its proper divisors (4519361447).

15164556121 is a wasteful number, since it uses less digits than its factorization.

15164556121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271281.

The product of its digits is 36000, while the sum is 37.

The spelling of 15164556121 in words is "fifteen billion, one hundred sixty-four million, five hundred fifty-six thousand, one hundred twenty-one".