64779055 has 8 divisors (see below), whose sum is σ = 84801744. Its totient is φ = 47112000.

The previous prime is 64778981. The next prime is 64779067. The reversal of 64779055 is 55097746.

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

It is not a de Polignac number, because 64779055 - 2¹⁵ = 64746287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588846 + ... + 588955.

It is an arithmetic number, because the mean of its divisors is an integer number (10600218).

Almost surely, 2^64779055 is an apocalyptic number.

64779055 is a deficient number, since it is larger than the sum of its proper divisors (20022689).

64779055 is a wasteful number, since it uses less digits than its factorization.

64779055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177817.

The product of its (nonzero) digits is 264600, while the sum is 43.

The square root of 64779055 is about 8048.5436570848. The cubic root of 64779055 is about 401.6164898515.

The spelling of 64779055 in words is "sixty-four million, seven hundred seventy-nine thousand, fifty-five".