1056505135545 has 16 divisors (see below), whose sum is σ = 1878231352320. Its totient is φ = 563469405552.

The previous prime is 1056505135481. The next prime is 1056505135573. The reversal of 1056505135545 is 5455315056501.

1056505135545 is a `hidden beast` number, since 1 + 0 + 5 + 6 + 50 + 51 + 3 + 5 + 545 = 666.

It is not a de Polignac number, because 1056505135545 - 2⁶ = 1056505135481 is a prime.

It is a super-3 number, since 3×1056505135545³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1056505135545.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3912981849 + ... + 3912982118.

It is an arithmetic number, because the mean of its divisors is an integer number (117389459520).

Almost surely, 2^{1056505135545} is an apocalyptic number.

1056505135545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1056505135545 is a deficient number, since it is larger than the sum of its proper divisors (821726216775).

1056505135545 is an equidigital number, since it uses as much as digits as its factorization.

1056505135545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7825963981 (or 7825963975 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 45.

The spelling of 1056505135545 in words is "one trillion, fifty-six billion, five hundred five million, one hundred thirty-five thousand, five hundred forty-five".