15135220551505 has 16 divisors (see below), whose sum is σ = 19593475312464. Its totient is φ = 11180913203200.

The previous prime is 15135220551497. The next prime is 15135220551551. The reversal of 15135220551505 is 50515502253151.

It can be written as a sum of positive squares in 8 ways, for example, as 434008216849 + 14701212334656 = 658793^2 + 3834216^2 .

It is not a de Polignac number, because 15135220551505 - 2³ = 15135220551497 is a prime.

It is a super-2 number, since 2×15135220551505² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

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, 1679820196 + ... + 1679829205.

It is an arithmetic number, because the mean of its divisors is an integer number (1224592207029).

Almost surely, 2^{15135220551505} is an apocalyptic number.

It is an amenable number.

15135220551505 is a deficient number, since it is larger than the sum of its proper divisors (4458254760959).

15135220551505 is a wasteful number, since it uses less digits than its factorization.

15135220551505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359649476.

The product of its (nonzero) digits is 187500, while the sum is 40.

The spelling of 15135220551505 in words is "fifteen trillion, one hundred thirty-five billion, two hundred twenty million, five hundred fifty-one thousand, five hundred five".