65131164 has 144 divisors (see below), whose sum is σ = 202209280. Its totient is φ = 17262720.

The previous prime is 65131159. The next prime is 65131177. The reversal of 65131164 is 46113156.

65131164 is a `hidden beast` number, since 651 + 3 + 1 + 1 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 291957 + ... + 292179.

Almost surely, 2^65131164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65131164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101104640).

65131164 is an abundant number, since it is smaller than the sum of its proper divisors (137078116).

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

65131164 is a wasteful number, since it uses less digits than its factorization.

65131164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320 (or 315 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 65131164 is about 8070.3880947573. The cubic root of 65131164 is about 402.3428425971.

The spelling of 65131164 in words is "sixty-five million, one hundred thirty-one thousand, one hundred sixty-four".