7523994138 has 8 divisors (see below), whose sum is σ = 15047988288. Its totient is φ = 2507998044.

The previous prime is 7523994131. The next prime is 7523994157. The reversal of 7523994138 is 8314993257.

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

7523994138 is an admirable number.

It is a super-2 number, since 2×7523994138² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7523994131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626999506 + ... + 626999517.

It is an arithmetic number, because the mean of its divisors is an integer number (1880998536).

Almost surely, 2^7523994138 is an apocalyptic number.

7523994138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7523994138 is a wasteful number, since it uses less digits than its factorization.

7523994138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253999028.

The product of its digits is 1632960, while the sum is 51.

The square root of 7523994138 is about 86740.9599785476. The cubic root of 7523994138 is about 1959.5190179274.

The spelling of 7523994138 in words is "seven billion, five hundred twenty-three million, nine hundred ninety-four thousand, one hundred thirty-eight".