64159540 has 24 divisors (see below), whose sum is σ = 134898120. Its totient is φ = 25632768.

The previous prime is 64159531. The next prime is 64159573. The reversal of 64159540 is 4595146.

It can be written as a sum of positive squares in 4 ways, for example, as 63504 + 64096036 = 252^2 + 8006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64159496 and 64159505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22516 + ... + 25204.

It is an arithmetic number, because the mean of its divisors is an integer number (5620755).

Almost surely, 2^64159540 is an apocalyptic number.

It is an amenable number.

64159540 is an abundant number, since it is smaller than the sum of its proper divisors (70738580).

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

64159540 is a wasteful number, since it uses less digits than its factorization.

64159540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3891 (or 3889 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 64159540 is about 8009.9650436191. The cubic root of 64159540 is about 400.3320991990.

The spelling of 64159540 in words is "sixty-four million, one hundred fifty-nine thousand, five hundred forty".