64949331898 has 12 divisors (see below), whose sum is σ = 107085882330. Its totient is φ = 29522423480.

The previous prime is 64949331851. The next prime is 64949331919. The reversal of 64949331898 is 89813394946.

It can be written as a sum of positive squares in only one way, i.e., 64807412329 + 141919569 = 254573^2 + 11913^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 134192593 + ... + 134193076.

Almost surely, 2^64949331898 is an apocalyptic number.

64949331898 is a deficient number, since it is larger than the sum of its proper divisors (42136550432).

64949331898 is a wasteful number, since it uses less digits than its factorization.

64949331898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268385693 (or 268385682 counting only the distinct ones).

The product of its digits is 40310784, while the sum is 64.

The spelling of 64949331898 in words is "sixty-four billion, nine hundred forty-nine million, three hundred thirty-one thousand, eight hundred ninety-eight".