64635613442 has 4 divisors (see below), whose sum is σ = 96953420166. Its totient is φ = 32317806720.

The previous prime is 64635613421. The next prime is 64635613451. The reversal of 64635613442 is 24431653646.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 55936507081 + 8699106361 = 236509^2 + 93269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64635613393 and 64635613402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16158903359 + ... + 16158903362.

Almost surely, 2^64635613442 is an apocalyptic number.

64635613442 is a deficient number, since it is larger than the sum of its proper divisors (32317806724).

64635613442 is a wasteful number, since it uses less digits than its factorization.

64635613442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32317806723.

The product of its digits is 1244160, while the sum is 44.

The spelling of 64635613442 in words is "sixty-four billion, six hundred thirty-five million, six hundred thirteen thousand, four hundred forty-two".