15215566566145 has 16 divisors (see below), whose sum is σ = 20966905126080. Its totient is φ = 10483452561600.

The previous prime is 15215566566121. The next prime is 15215566566197. The reversal of 15215566566145 is 54166566551251.

It is not a de Polignac number, because 15215566566145 - 2⁴³ = 6419473543937 is a prime.

It is a super-2 number, since 2×15215566566145² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15215566566145.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7280174346 + ... + 7280176435.

It is an arithmetic number, because the mean of its divisors is an integer number (1310431570380).

Almost surely, 2^{15215566566145} is an apocalyptic number.

It is an amenable number.

15215566566145 is a deficient number, since it is larger than the sum of its proper divisors (5751338559935).

15215566566145 is a wasteful number, since it uses less digits than its factorization.

15215566566145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14560350816.

The product of its digits is 32400000, while the sum is 58.

The spelling of 15215566566145 in words is "fifteen trillion, two hundred fifteen billion, five hundred sixty-six million, five hundred sixty-six thousand, one hundred forty-five".