65113578 has 64 divisors (see below), whose sum is σ = 151280640. Its totient is φ = 20736000.

The previous prime is 65113561. The next prime is 65113637. The reversal of 65113578 is 87531156.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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, 162178 + ... + 162578.

It is an arithmetic number, because the mean of its divisors is an integer number (2363760).

Almost surely, 2^65113578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65113578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75640320).

65113578 is an abundant number, since it is smaller than the sum of its proper divisors (86167062).

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

65113578 is a wasteful number, since it uses less digits than its factorization.

65113578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 534 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 65113578 is about 8069.2984825200. The cubic root of 65113578 is about 402.3066272755.

The spelling of 65113578 in words is "sixty-five million, one hundred thirteen thousand, five hundred seventy-eight".