15545215049 has 12 divisors (see below), whose sum is σ = 19237697856. Its totient is φ = 12299509872.

The previous prime is 15545215031. The next prime is 15545215069. The reversal of 15545215049 is 94051254551.

It is a happy number.

It is not a de Polignac number, because 15545215049 - 2¹⁶ = 15545149513 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 15545214997 and 15545215015.

It is not an unprimeable number, because it can be changed into a prime (15545215069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6569069 + ... + 6571434.

It is an arithmetic number, because the mean of its divisors is an integer number (1603141488).

Almost surely, 2^15545215049 is an apocalyptic number.

It is an amenable number.

15545215049 is a deficient number, since it is larger than the sum of its proper divisors (3692482807).

15545215049 is a wasteful number, since it uses less digits than its factorization.

15545215049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13140536 (or 13140523 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 15545215049 in words is "fifteen billion, five hundred forty-five million, two hundred fifteen thousand, forty-nine".