15421544145 has 24 divisors (see below), whose sum is σ = 30549345216. Its totient is φ = 7049848608.

The previous prime is 15421544113. The next prime is 15421544147. The reversal of 15421544145 is 54144512451.

15421544145 is a `hidden beast` number, since 1 + 54 + 21 + 544 + 1 + 45 = 666.

15421544145 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 15421544145 - 2⁵ = 15421544113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15421544147) 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 23 ways as a sum of consecutive naturals, for example, 24478327 + ... + 24478956.

It is an arithmetic number, because the mean of its divisors is an integer number (1272889384).

Almost surely, 2^15421544145 is an apocalyptic number.

15421544145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15421544145 is a deficient number, since it is larger than the sum of its proper divisors (15127801071).

15421544145 is a wasteful number, since it uses less digits than its factorization.

15421544145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48957301 (or 48957298 counting only the distinct ones).

The product of its digits is 64000, while the sum is 36.

The spelling of 15421544145 in words is "fifteen billion, four hundred twenty-one million, five hundred forty-four thousand, one hundred forty-five".