8738891565 has 32 divisors (see below), whose sum is σ = 14858277120. Its totient is φ = 4370709504.

The previous prime is 8738891549. The next prime is 8738891611. The reversal of 8738891565 is 5651988378.

It is not a de Polignac number, because 8738891565 - 2⁴ = 8738891549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8738891499 and 8738891508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8776 + ... + 132494.

It is an arithmetic number, because the mean of its divisors is an integer number (464321160).

Almost surely, 2^8738891565 is an apocalyptic number.

8738891565 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8738891565 is a deficient number, since it is larger than the sum of its proper divisors (6119385555).

8738891565 is a wasteful number, since it uses less digits than its factorization.

8738891565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124021.

The product of its digits is 14515200, while the sum is 60.

The square root of 8738891565 is about 93482.0387293730. The cubic root of 8738891565 is about 2059.7702610073.

The spelling of 8738891565 in words is "eight billion, seven hundred thirty-eight million, eight hundred ninety-one thousand, five hundred sixty-five".