64061885 has 16 divisors (see below), whose sum is σ = 79358832. Its totient is φ = 49612800.

The previous prime is 64061869. The next prime is 64061891. The reversal of 64061885 is 58816046.

It can be written as a sum of positive squares in 8 ways, for example, as 4169764 + 59892121 = 2042^2 + 7739^2 .

It is not a de Polignac number, because 64061885 - 2⁴ = 64061869 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 26945 + ... + 29225.

It is an arithmetic number, because the mean of its divisors is an integer number (4959927).

Almost surely, 2^64061885 is an apocalyptic number.

It is an amenable number.

64061885 is a deficient number, since it is larger than the sum of its proper divisors (15296947).

64061885 is a wasteful number, since it uses less digits than its factorization.

64061885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 64061885 is about 8003.8668779534. The cubic root of 64061885 is about 400.1288855502.

It can be divided in two parts, 64061 and 885, that added together give a palindrome (64946).

The spelling of 64061885 in words is "sixty-four million, sixty-one thousand, eight hundred eighty-five".