64947157318 has 8 divisors (see below), whose sum is σ = 97429239648. Its totient is φ = 32470744104.

The previous prime is 64947157313. The next prime is 64947157393. The reversal of 64947157318 is 81375174946.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64947157313) 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, 1388521 + ... + 1434532.

It is an arithmetic number, because the mean of its divisors is an integer number (12178654956).

Almost surely, 2^64947157318 is an apocalyptic number.

64947157318 is a deficient number, since it is larger than the sum of its proper divisors (32482082330).

64947157318 is a wasteful number, since it uses less digits than its factorization.

64947157318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2834558.

The product of its digits is 5080320, while the sum is 55.

The spelling of 64947157318 in words is "sixty-four billion, nine hundred forty-seven million, one hundred fifty-seven thousand, three hundred eighteen".