64981147395 has 64 divisors (see below), whose sum is σ = 113716224000. Its totient is φ = 31543756800.

The previous prime is 64981147393. The next prime is 64981147403. The reversal of 64981147395 is 59374118946.

It is a happy number.

64981147395 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 254914²-1.

It is not a de Polignac number, because 64981147395 - 2¹ = 64981147393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64981147393) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 21666106 + ... + 21669104.

It is an arithmetic number, because the mean of its divisors is an integer number (1776816000).

Almost surely, 2^64981147395 is an apocalyptic number.

64981147395 is a deficient number, since it is larger than the sum of its proper divisors (48735076605).

64981147395 is a wasteful number, since it uses less digits than its factorization.

64981147395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5796.

The product of its digits is 6531840, while the sum is 57.

The spelling of 64981147395 in words is "sixty-four billion, nine hundred eighty-one million, one hundred forty-seven thousand, three hundred ninety-five".