64328761 has 8 divisors (see below), whose sum is σ = 74056320. Its totient is φ = 54735648.

The previous prime is 64328749. The next prime is 64328767. The reversal of 64328761 is 16782346.

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

It is a cyclic number.

It is not a de Polignac number, because 64328761 - 2¹⁵ = 64295993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64328761.

It is not an unprimeable number, because it can be changed into a prime (64328767) 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, 32581 + ... + 34498.

It is an arithmetic number, because the mean of its divisors is an integer number (9257040).

Almost surely, 2^64328761 is an apocalyptic number.

It is an amenable number.

64328761 is a deficient number, since it is larger than the sum of its proper divisors (9727559).

64328761 is a wasteful number, since it uses less digits than its factorization.

64328761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67223.

The product of its digits is 48384, while the sum is 37.

The square root of 64328761 is about 8020.5212424131. The cubic root of 64328761 is about 400.6837493013.

The spelling of 64328761 in words is "sixty-four million, three hundred twenty-eight thousand, seven hundred sixty-one".