1138521567 has 16 divisors (see below), whose sum is σ = 1548408960. Its totient is φ = 743856672.

The previous prime is 1138521563. The next prime is 1138521577. The reversal of 1138521567 is 7651258311.

It is not a de Polignac number, because 1138521567 - 2² = 1138521563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138521563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158508 + ... + 165534.

It is an arithmetic number, because the mean of its divisors is an integer number (96775560).

Almost surely, 2^1138521567 is an apocalyptic number.

1138521567 is a deficient number, since it is larger than the sum of its proper divisors (409887393).

1138521567 is a wasteful number, since it uses less digits than its factorization.

1138521567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8102.

The product of its digits is 50400, while the sum is 39.

The square root of 1138521567 is about 33741.9852261244. The cubic root of 1138521567 is about 1044.1921419741.

Adding to 1138521567 its reverse (7651258311), we get a palindrome (8789779878).

The spelling of 1138521567 in words is "one billion, one hundred thirty-eight million, five hundred twenty-one thousand, five hundred sixty-seven".