64354671618 has 16 divisors (see below), whose sum is σ = 128712658656. Its totient is φ = 21451004640.

The previous prime is 64354671607. The next prime is 64354671649. The reversal of 64354671618 is 81617645346.

It is a super-2 number, since 2×64354671618² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165558 + ... + 395118.

It is an arithmetic number, because the mean of its divisors is an integer number (8044541166).

Almost surely, 2^64354671618 is an apocalyptic number.

64354671618 is an abundant number, since it is smaller than the sum of its proper divisors (64357987038).

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

64354671618 is a wasteful number, since it uses less digits than its factorization.

64354671618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276289.

The product of its digits is 2903040, while the sum is 51.

The spelling of 64354671618 in words is "sixty-four billion, three hundred fifty-four million, six hundred seventy-one thousand, six hundred eighteen".