65161560 has 64 divisors (see below), whose sum is σ = 196577280. Its totient is φ = 17279360.

The previous prime is 65161559. The next prime is 65161567. The reversal of 65161560 is 6516156.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65161567) 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, 21499 + ... + 24341.

It is an arithmetic number, because the mean of its divisors is an integer number (3071520).

Almost surely, 2^65161560 is an apocalyptic number.

65161560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65161560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98288640).

65161560 is an abundant number, since it is smaller than the sum of its proper divisors (131415720).

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

65161560 is a wasteful number, since it uses less digits than its factorization.

65161560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3048 (or 3044 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 65161560 is about 8072.2710559049. The cubic root of 65161560 is about 402.4054225272.

The spelling of 65161560 in words is "sixty-five million, one hundred sixty-one thousand, five hundred sixty".