2135174023540 has 48 divisors (see below), whose sum is σ = 4511154673872. Its totient is φ = 848880377856.

The previous prime is 2135174023537. The next prime is 2135174023583. The reversal of 2135174023540 is 453204715312.

It can be written as a sum of positive squares in 8 ways, for example, as 124104016656 + 2011070006884 = 352284^2 + 1418122^2 .

It is a super-2 number, since 2×2135174023540² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2135174023540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3656404 + ... + 4199956.

It is an arithmetic number, because the mean of its divisors is an integer number (93982389039).

Almost surely, 2^{2135174023540} is an apocalyptic number.

2135174023540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2135174023540 is an abundant number, since it is smaller than the sum of its proper divisors (2375980650332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2135174023540 is a wasteful number, since it uses less digits than its factorization.

2135174023540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544756 (or 544754 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 37.

Adding to 2135174023540 its reverse (453204715312), we get a palindrome (2588378738852).

The spelling of 2135174023540 in words is "two trillion, one hundred thirty-five billion, one hundred seventy-four million, twenty-three thousand, five hundred forty".