65164540 has 48 divisors (see below), whose sum is σ = 157248000. Its totient is φ = 22220352.

The previous prime is 65164523. The next prime is 65164559. The reversal of 65164540 is 4546156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26691 + ... + 29029.

It is an arithmetic number, because the mean of its divisors is an integer number (3276000).

Almost surely, 2^65164540 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 65164540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78624000).

65164540 is an abundant number, since it is smaller than the sum of its proper divisors (92083460).

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

65164540 is a wasteful number, since it uses less digits than its factorization.

65164540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2554 (or 2552 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 65164540 is about 8072.4556362980. The cubic root of 65164540 is about 402.4115567669.

The spelling of 65164540 in words is "sixty-five million, one hundred sixty-four thousand, five hundred forty".