64017861 has 8 divisors (see below), whose sum is σ = 86526720. Its totient is φ = 42093792.

The previous prime is 64017857. The next prime is 64017893. The reversal of 64017861 is 16871046.

It is a happy number.

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

It is not a de Polignac number, because 64017861 - 2² = 64017857 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64010861) 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, 145941 + ... + 146378.

It is an arithmetic number, because the mean of its divisors is an integer number (10815840).

Almost surely, 2^64017861 is an apocalyptic number.

It is an amenable number.

64017861 is a deficient number, since it is larger than the sum of its proper divisors (22508859).

64017861 is a wasteful number, since it uses less digits than its factorization.

64017861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292395.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 64017861 is about 8001.1162346263. The cubic root of 64017861 is about 400.0372069557.

The spelling of 64017861 in words is "sixty-four million, seventeen thousand, eight hundred sixty-one".