6742532138 has 8 divisors (see below), whose sum is σ = 10203301188. Its totient is φ = 3341431744.

The previous prime is 6742532119. The next prime is 6742532171. The reversal of 6742532138 is 8312352476.

It can be written as a sum of positive squares in 2 ways, for example, as 4288023289 + 2454508849 = 65483^2 + 49543^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 6742532095 and 6742532104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14916881 + ... + 14917332.

Almost surely, 2^6742532138 is an apocalyptic number.

6742532138 is a deficient number, since it is larger than the sum of its proper divisors (3460769050).

6742532138 is a wasteful number, since it uses less digits than its factorization.

6742532138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29834328.

The product of its digits is 241920, while the sum is 41.

The square root of 6742532138 is about 82112.9230876602. The cubic root of 6742532138 is about 1889.1843608781.

The spelling of 6742532138 in words is "six billion, seven hundred forty-two million, five hundred thirty-two thousand, one hundred thirty-eight".