64117378 has 8 divisors (see below), whose sum is σ = 103574268. Its totient is φ = 29592624.

The previous prime is 64117369. The next prime is 64117379. The reversal of 64117378 is 87371146.

It can be written as a sum of positive squares in 2 ways, for example, as 64112049 + 5329 = 8007^2 + 73^2 .

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

It is a super-3 number, since 3×64117378³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (64117379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233001 + ... + 1233052.

Almost surely, 2^64117378 is an apocalyptic number.

64117378 is a deficient number, since it is larger than the sum of its proper divisors (39456890).

64117378 is a wasteful number, since it uses less digits than its factorization.

64117378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2466068.

The product of its digits is 28224, while the sum is 37.

The square root of 64117378 is about 8007.3327644104. The cubic root of 64117378 is about 400.2443881557.

The spelling of 64117378 in words is "sixty-four million, one hundred seventeen thousand, three hundred seventy-eight".