64531061 has 8 divisors (see below), whose sum is σ = 76293120. Its totient is φ = 53404848.

The previous prime is 64531043. The next prime is 64531063. The reversal of 64531061 is 16013546.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64531061 - 2¹⁸ = 64268917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64531061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64531063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158741 + ... + 159146.

It is an arithmetic number, because the mean of its divisors is an integer number (9536640).

Almost surely, 2^64531061 is an apocalyptic number.

It is an amenable number.

64531061 is a deficient number, since it is larger than the sum of its proper divisors (11762059).

64531061 is a wasteful number, since it uses less digits than its factorization.

64531061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317923.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 64531061 is about 8033.1227427446. The cubic root of 64531061 is about 401.1033309373.

The spelling of 64531061 in words is "sixty-four million, five hundred thirty-one thousand, sixty-one".