64015381378 has 8 divisors (see below), whose sum is σ = 103409462268. Its totient is φ = 29545560624.

The previous prime is 64015381361. The next prime is 64015381387. The reversal of 64015381378 is 87318351046.

It can be written as a sum of positive squares in 2 ways, for example, as 63858806209 + 156575169 = 252703^2 + 12513^2 .

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

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, 1231065001 + ... + 1231065052.

Almost surely, 2^64015381378 is an apocalyptic number.

64015381378 is a deficient number, since it is larger than the sum of its proper divisors (39394080890).

64015381378 is a wasteful number, since it uses less digits than its factorization.

64015381378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462130068.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 64015381378 in words is "sixty-four billion, fifteen million, three hundred eighty-one thousand, three hundred seventy-eight".