64551378 has 8 divisors (see below), whose sum is σ = 129102768. Its totient is φ = 21517124.

The previous prime is 64551353. The next prime is 64551391. The reversal of 64551378 is 87315546.

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

64551378 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5379276 + ... + 5379287.

It is an arithmetic number, because the mean of its divisors is an integer number (16137846).

Almost surely, 2^64551378 is an apocalyptic number.

64551378 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64551378 is a wasteful number, since it uses less digits than its factorization.

64551378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10758568.

The product of its digits is 100800, while the sum is 39.

The square root of 64551378 is about 8034.3872199440. The cubic root of 64551378 is about 401.1454210623.

The spelling of 64551378 in words is "sixty-four million, five hundred fifty-one thousand, three hundred seventy-eight".