64409755 has 8 divisors (see below), whose sum is σ = 77719824. Its totient is φ = 51242400.

The previous prime is 64409747. The next prime is 64409767. The reversal of 64409755 is 55790446.

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

It is not a de Polignac number, because 64409755 - 2³ = 64409747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34681 + ... + 36490.

It is an arithmetic number, because the mean of its divisors is an integer number (9714978).

Almost surely, 2^64409755 is an apocalyptic number.

64409755 is a deficient number, since it is larger than the sum of its proper divisors (13310069).

64409755 is a wasteful number, since it uses less digits than its factorization.

64409755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71357.

The product of its (nonzero) digits is 151200, while the sum is 40.

The square root of 64409755 is about 8025.5688271923. The cubic root of 64409755 is about 400.8518408800.

The spelling of 64409755 in words is "sixty-four million, four hundred nine thousand, seven hundred fifty-five".