28135185753519 has 32 divisors (see below), whose sum is σ = 45241494896640. Its totient is φ = 17177630039136.

The previous prime is 28135185753497. The next prime is 28135185753583. The reversal of 28135185753519 is 91535758153182.

It is a happy number.

28135185753519 is a `hidden beast` number, since 2 + 8 + 1 + 3 + 5 + 1 + 8 + 575 + 3 + 51 + 9 = 666.

It is not a de Polignac number, because 28135185753519 - 2⁹ = 28135185753007 is a prime.

It is a super-2 number, since 2×28135185753519² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135185753919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315535047 + ... + 315624200.

It is an arithmetic number, because the mean of its divisors is an integer number (1413796715520).

Almost surely, 2^{28135185753519} is an apocalyptic number.

28135185753519 is a deficient number, since it is larger than the sum of its proper divisors (17106309143121).

28135185753519 is a wasteful number, since it uses less digits than its factorization.

28135185753519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631159396 (or 631159390 counting only the distinct ones).

The product of its digits is 45360000, while the sum is 63.

The spelling of 28135185753519 in words is "twenty-eight trillion, one hundred thirty-five billion, one hundred eighty-five million, seven hundred fifty-three thousand, five hundred nineteen".