15551505135 has 12 divisors (see below), whose sum is σ = 26955942312. Its totient is φ = 8294136048.

The previous prime is 15551505121. The next prime is 15551505209. The reversal of 15551505135 is 53150515551.

15551505135 is a `hidden beast` number, since 1 + 5 + 5 + 515 + 0 + 5 + 135 = 666.

It is not a de Polignac number, because 15551505135 - 2⁷ = 15551505007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15551505135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172794457 + ... + 172794546.

It is an arithmetic number, because the mean of its divisors is an integer number (2246328526).

Almost surely, 2^15551505135 is an apocalyptic number.

15551505135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15551505135 is a deficient number, since it is larger than the sum of its proper divisors (11404437177).

15551505135 is a wasteful number, since it uses less digits than its factorization.

15551505135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345589014 (or 345589011 counting only the distinct ones).

The product of its (nonzero) digits is 46875, while the sum is 36.

The spelling of 15551505135 in words is "fifteen billion, five hundred fifty-one million, five hundred five thousand, one hundred thirty-five".