7565138489 has 4 divisors (see below), whose sum is σ = 7565333760. Its totient is φ = 7564943220.

The previous prime is 7565138473. The next prime is 7565138527. The reversal of 7565138489 is 9848315657.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7565138489 - 2⁴ = 7565138473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7565138089) 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, 17717 + ... + 124274.

It is an arithmetic number, because the mean of its divisors is an integer number (1891333440).

Almost surely, 2^7565138489 is an apocalyptic number.

It is an amenable number.

7565138489 is a deficient number, since it is larger than the sum of its proper divisors (195271).

7565138489 is a wasteful number, since it uses less digits than its factorization.

7565138489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195270.

The product of its digits is 7257600, while the sum is 56.

The square root of 7565138489 is about 86977.8045767999. The cubic root of 7565138489 is about 1963.0843504389.

The spelling of 7565138489 in words is "seven billion, five hundred sixty-five million, one hundred thirty-eight thousand, four hundred eighty-nine".