7543993140 has 72 divisors (see below), whose sum is σ = 22908380040. Its totient is φ = 2009539584.

The previous prime is 7543993109. The next prime is 7543993141. The reversal of 7543993140 is 413993457.

7543993140 is a `hidden beast` number, since 7 + 543 + 9 + 93 + 14 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 266538276 + 7277454864 = 16326^2 + 85308^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7543993141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146296 + ... + 191024.

It is an arithmetic number, because the mean of its divisors is an integer number (318171945).

Almost surely, 2^7543993140 is an apocalyptic number.

It is an amenable number.

7543993140 is an abundant number, since it is smaller than the sum of its proper divisors (15364386900).

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

7543993140 is a wasteful number, since it uses less digits than its factorization.

7543993140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45681 (or 45676 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 7543993140 is about 86856.1635118660. The cubic root of 7543993140 is about 1961.2536353787.

The spelling of 7543993140 in words is "seven billion, five hundred forty-three million, nine hundred ninety-three thousand, one hundred forty".