54991528785 has 48 divisors (see below), whose sum is σ = 95927255424. Its totient is φ = 29142087936.

The previous prime is 54991528771. The next prime is 54991528789. The reversal of 54991528785 is 58782519945.

54991528785 is a `hidden beast` number, since 549 + 9 + 1 + 5 + 2 + 8 + 7 + 85 = 666.

It is not a de Polignac number, because 54991528785 - 2¹⁵ = 54991496017 is a prime.

It is a super-2 number, since 2×54991528785² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54991528789) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5268742 + ... + 5279168.

It is an arithmetic number, because the mean of its divisors is an integer number (1998484488).

Almost surely, 2^54991528785 is an apocalyptic number.

It is an amenable number.

54991528785 is a deficient number, since it is larger than the sum of its proper divisors (40935726639).

54991528785 is a wasteful number, since it uses less digits than its factorization.

54991528785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11174 (or 11171 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 63.

The spelling of 54991528785 in words is "fifty-four billion, nine hundred ninety-one million, five hundred twenty-eight thousand, seven hundred eighty-five".