64604301981 has 8 divisors (see below), whose sum is σ = 86141765280. Its totient is φ = 43068186672.

The previous prime is 64604301959. The next prime is 64604302013. The reversal of 64604301981 is 18910340646.

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

It is not a de Polignac number, because 64604301981 - 2¹¹ = 64604299933 is a prime.

It is a super-2 number, since 2×64604301981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64604301781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219295 + ... + 421068.

It is an arithmetic number, because the mean of its divisors is an integer number (10767720660).

Almost surely, 2^64604301981 is an apocalyptic number.

It is an amenable number.

64604301981 is a deficient number, since it is larger than the sum of its proper divisors (21537463299).

64604301981 is a wasteful number, since it uses less digits than its factorization.

64604301981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673995.

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 64604301981 in words is "sixty-four billion, six hundred four million, three hundred one thousand, nine hundred eighty-one".